If you forget a change or addition to the amida during the 10 Days of Repentance (between Rosh Hashana and Yom Kippur), the only one for which you must return or repeat the amida is ha'melech ha'kadosh (third blessing).

Although it is preferable to join a minyan whenever possible, prayer services may be said without a minyan. However, certain prayers may be said (or omitted) only with a minyan present:

• Bar'chu (morning and night),
• The word “Eloheinu” in the birkat ha'mazon introduction,
• Kaddish,
• Kedusha,
• Reader's repetition of the amida,
• Sheva brachot (the seven blessings) at a wedding,
• Sheva brachot during the week following the wedding,
• 13 midot in selichot,
• Torah reading if there will be aliyot, and
• Skipping the three introductory words for the shema.

Here is when to pause or join the minyan during general prayer services:

• Ashrei

• Torah Reading 

• Kaddish

• Alenu

The synagogue (shul) prayer service may confuse the unfamiliar. Here is a brief guide to following the congregational prayers.
 
Ends/Beginnings of Paragraphs
Each individual says most of the prayers, but the leader sets the pace. He says out loud the last line or two of many paragraphs (and sometimes the next paragraph's first few words), to help others find where he is in the prayers.
Hint If you get lost, listen to the leader and try to find those words at the beginning or end of one of the paragraphs near where you think you should be!
 
Saying Amen
When the prayer leader/chazan says a blessing (Baruch ata adonai...) and finishes the final word, everyone usually replies amen.
 
Baruch Hu U'Varuch Shemo
It is common (but not required) to say baruch hu u'varuch shemo after hearing God's name (Adonai) when it is said in a blessing.
This list mainly includes the parts of the prayer service that are said together or when in synagogue, not those said individually or at home.
NoteIf you need to use the toilet between baruch she'amar and yishtabach, say asher yatzar after saying yishtabach and before saying yotzeir or.
 
The initial blessings beginning with asher natan... through the end of ven brit may be said at home.
 
Ma Tovu
Upon arriving in synagogue in the morning, say Ma tovu....
 
Talit
Married men (and also those with a tradition to wear a talit from bar mitzva age) normally put on their talit gadol on all days (except Tish'a b'Av morning).
For more details, see Talit (Gadol).
 
Tefilin
On weekdays, all men put on tefilin. They do not interrupt putting on tefilin to respond to other's prayers, not even to say amen. 
For more details, see Tefilin.
 
Birchot HaShachar/Initial Blessings
If you have not yet said the initial blessings beginning with asher natan... through the end of ven brit, say them once you are in synagogue and after you have put on talit/tefilin (if relevant).  
Everyone stands while the prayer leader reads the initial blessings aloud.  They say amen after each one. 
 
L'Olam Yehei Adam/Shema
L'olam yehei adam is said quietly, with everyone saying the shema line together.
 
Order of the Sacrifices
Some read (quietly) the order of the sacrifices.
 
13 Principles of Talmud Explanation/Kaddish

• The 13 principles of how the Talmud is explained are read quietly.
• Kaddish is said by any mourners.
• Everyone says, amen, yihei shmei raba...

 
Mizmor Shir/Kaddish

• Mizmor shir is read quietly.
• Another kaddish is said by the mourners.

Baruch SheAmar
            Baruch she'amar is said by everyone, standing.  The leader says the final blessing out loud.
 
Verses (Psukim)
The following several pages are verses (psukim) from various sources, said by everyone quietly.
Mizmor L'Toda/Yehi Chevod

• Everyone stands to say mizmor l'toda quietly (just for this paragraph).
• The next paragraph (yehi chevod) is read quietly.

 
Ashrei and 5 Psalms
Ashrei and the following five psalms (#146 to 150) are said quietly by everyone; the leader says the final line or two out loud.
 
Baruch Adonai L'Olam Amen v'Amen
Baruch adonai... is said by the leader.  
 
VaYevarech David
The next section (from va'yevarech David until after bar'chu) is said quietly by everyone while standing.
 
Shirat HaYam
Shirat ha'yam is read quietly by everyone.
 
Yishtabach/Kaddish
Yishtabach is said quietly by everyone together. The leader says the final line of yishtabach out loud and then kaddish.
 
Bar'chu

• The leader says Bar'chu et Adonai ha'mevorach.
• Everyone bows from the waist and replies (aloud), Baruch Adonai ha'mevorach l'olam va'ed (which is then repeated by the leader).
• Everyone says the blessing's ending ...u'vorei et ha'kol.

 
Shema and Its Blessings
The next paragraphs lead up to the shema:

• Leader says, “Et shem ha'el...”
• Everyone says aloud, together: Kadosh, kadosh, kadosh... and Baruch kevod Adonai mi'mkomo.
• Leader says the final line or two of La'el baruch ne'imot... and everyone responds amen.
• Everyone says ahavat olam quietly.
• Leader reads the final lines aloud.
  Note It is the custom to not say amen to the blessing before shema.
• Everyone says the first line of the shema together and aloud, but Baruch shem... silently. 
• Everyone reads the shema individually, and the leader repeats out loud Adonai eloheichem emet.
• Everyone reads the next paragraphs, through ezrat avoteinu, together, quietly.

 
Mi Chamocha
Stand for Mi chamocha until after the amida.

Adonai Yimloch
Everyone reads together and aloud: Adonai yimloch... until the final blessing before the amida.
Note At some time before completing that blessing, step back far enough (one large step is fine) so that you can take three small steps forward to begin the amida. If there is no room to step back, you may pray the amida without stepping forward.
 
The Amida
Amida: Details and Direction
For more details on saying the amida, see What To Pray: Set Prayers: Amida
For where to face during the amida, see Amida: Location: Where To Face
 
Stepping To Begin the Amida
After saying ga'al Yisrael, symbolically approach God by taking three steps forward (any size of steps is fine):

• Step forward with your right foot,
• Step forward with your left foot, and
• Step forward with your right foot.
• Bring your left foot to meet the right one, so that both feet are touching at the heels and at the balls (so that you are standing as if you had one leg, like the angels!)

Bowing in the Amida
Next, with your feet still together, do knee-bowing at the start and end of the first paragraph.  You will also be bowing at:

• Beginning of modim (waist-bowing).
• End of modim (knee-bowing at Baruch ata Adonai of the blessing ending u'lecha na'eh l'hodot).

           
Slach Lanu
In slach lanu, when saying ki chatanu and ki fashanu, hit your chest over your heart with your fist.
Reason We are saying that we sinned, so we strike our heart for leading us astray.
 
Ending the Amida
Symbolically take leave of God by taking three steps back after Adonai tzuri v'go'ali:

• Step back on your left foot,
• Step back on your right foot,
• Step back on your left foot (and then place your right foot next to your left foot).
• Bow to the left while saying Oseh shalom bi'mromav...,
• Bow to the right while saying Hu ya'aseh shalom alenu, and
• Bow to the middle (straight in front of you) while saying Ve'al kol yisrael v'imru amen.

Then pause for at least three seconds before walking forward or sitting down.
 
Reader's Repetition of Amida
At kedusha, everyone stands (even if they were sitting so far for the amida's repetition) with their feet together, again imitating the angels who only have one leg.

• The leader says nekadeish (in some places, everyone says nekadeish).
• Everyone says the next line together (kadosh, kadosh, kadosh...).

• After the leader says Halleluya, everyone else may move their feet (or sit down, if that is their custom).
• On fast days, the leader says an extra paragraph in shacharit (other paragraphs in mincha are said by everyone).

Tachanun

When To Say Tachanun
Tachanun is usually said on weekdays.

How To Say Tachanun
Tachanun is said differently, depending on if there is a Torah scroll in the room, as follows:

• Say Va'yomer David sitting down, while resting your head on your left arm (unless you are wearing tefilin on your left arm, in which case lean onto your right arm). 

• When you reach shomer Yisrael, lift your head up and sit normally while saying the paragraphs until v'anachnu lo neida ma na'aseh.
• Before saying “na'aseh,” stand up for the remainder of tachanun.

• Say tachanun standing until Va'yomer David... at which time, everyone sits down.
• Follow the directions above for the remainder of tachanun.

 

Hallel

• When hallel is said, most of the psalms are said quietly by everyone.  (In some synagogues, several of the psalms are sung in unison.)
• The lines beginning Hodu l'adonai... are read aloud by the leader.
• Everyone else responds aloud, Hodu l'adonai... and reads quietly the next line (which the leader then reads aloud when they finish).
• Similarly, Ana adonai is read responsively by the leader, followed by everyone else.

 
Kaddish
The leader says kaddish out loud.
 
Torah Reading (Mondays and Thursdays)

• Everyone reads quietly the phrases va'yehi be'nso'a... and brich shmei.
• The Torah is taken out and carried to the bima.
• As each man (called an oleh) is called up to the Torah:
  • The oleh says Bar'chu...
  • Everyone responds Baruch Adonai....,
  • The oleh repeats that line and says a blessing.
  • Everyone answers amen.
• After each reading, the oleh says one more blessing and everyone replies amen.
• After the third aliya, the Torah is lifted up.
• Everyone says, V'zot haTorah....
• The Torah is rolled and wrapped.
• Meanwhile, the leader reads four paragraphs beginning, Yehi ratzon mi'lifnei avinu...
• The final paragraph, Acheinu kol bet yisrael... is read by everyone aloud.
• The Torah is put back while everyone reads two psalms quietly.

 
Ashrei/U'va L'Tzion

• Everyone reads ashrei quietly, followed by la'menatzeiach and u'va l'tziyon.
• Everyone together says, Kadosh, kadosh, kadosh and Baruch kevod.

 
Kaddish
The leader says kaddish.
 
Alenu
Everyone says alenu together.
 
Kaddish
Mourners say kaddish.
 
Psalm for the Day
Psalm for that day is read by everyone.
 
Kaddish
One more kaddish is said by the mourners.
 
L'David

• During Elul and into Tishrei, L'David is read by everyone.
• One more kaddish is said by the mourners.

 
Praying Ma'ariv
 
V'hu Rachum
Everyone reads the two introductory lines of v'hu rachum.
 
Bar'chu

• Leader says bar'chu.
• Everyone else responds, baruch Adonai....
• The leader repeats that line.
• Everyone reads the next paragraph/blessing.
• The leader says that final line out loud.
• Everyone responds amen.

Note Don't say baruch hu u'varuch shemo at all during ma'ariv.
 
Shema and Its Blessings

• The leader repeats the final two words of the shema and the word emet.
• Everyone continues quietly saying the phrases until Mi chamocha.
• Mi chamocha is said by everyone together including by the leader, who then also reads the next line.
• Everyone says Adonai yimloch... together, continuing through the end of the next blessing, which is repeated by the leader.
• Everyone says hashkiveinu quietly.
• The leader says the blessing shomer amo Yisrael la'ad out loud.
• Baruch Adonai l'olam... is said through to the end by everyone quietly.
• The leader says the final line and the final blessing out loud.

Note Baruch Adonai l'olam is not said in Eretz Yisrael.
 
Kaddish
The leader says kaddish.
 
Amida
Everyone says the amida silently and individually.
 
Kaddish
The leader says kaddish.
 
Alenu
Everyone says alenu together.
 
Kaddish
Kaddish is said by any mourners.

 

• Unwrap the excess strap from your palm and wrap it three times around your middle finger while saying the three “v'eirastich li” phrases, one for each wrap.
• Wrap the strap around your palm in the shape of the Hebrew letter “shin.”
• Wrap the excess around your palm and tuck in the end of the strap to keep it tight and out of your way.

Introduction to Missed Amida/Tashlumim
If you accidentally miss any amida, you may make up for it (tashlumin)--unless you intentionally missed it.

Amida: Errors: Missed Amida/Tashlumin: Regular Days
Missed Ma'ariv Amida
If you accidentally did not say the amida for ma'ariv:

• Say the normal shacharit amida the next morning with the other men in the minyan.
• Say ashrei.
• When the leader begins his repetition of the amida, say the amida along with him, word for word, including kedusha.
• After saying ha'el ha'kadosh, finish your amida at your own pace.
• If you are not with a minyan, say ashrei and then repeat the shacharit amida.

Missed Shacharit Amida
If you accidentally did not say the amida for shacharit:

• Say the normal mincha amida with the other men in the minyan.
• Say ashrei.

• When the leader begins his repetition of the amida, say the amida along with him, word for word, including kedusha.
• After saying ha'el ha'kadosh, finish your amida at your own pace.
• If you are not with a minyan, say ashrei and then say the mincha amida a second time.

Missed Mincha Amida
If you accidentally did not say the amida for mincha:

• Say the normal ma'ariv amida with the other men in the minyan.
• Say ashrei.
• Say the ma'ariv amida a second time. Skip modim.
• If you are not with a minyan, say ashrei a second time and repeat the ma'ariv amida.

Note At the next prayer service, say whatever is the correct amida for that later prayer service, even if it is not the same amida that you missed.
If you miss mincha on Friday, say the ma'ariv service for Shabbat and repeat that amida again.
Note Once the time for the next amida has passed, you may not make up the missed amida.
Example
If you missed mincha on Thursday, you may only say tashlumin for mincha as long as you may still say ma'ariv, which is daybreak of Friday morning.

Amida: Errors: Missed Amida/Tashlumin: Shabbat/Jewish Festivals
Even if you forgot to say a prayer service on Shabbat and Jewish festivals, say the next prayer service amida and repeat THAT amida to make up (tashlumin) for the one you missed--even if it is no longer Shabbat or the Jewish festival.
Exception
There is no tashlumin for musaf. However, you may say musaf until sunset, even if you already said mincha.
Note If the time for mincha has arrived (½ hour after halachic midday), you must say mincha before saying musaf (but if you could join a mincha minyan later, you may say musaf now).
Situation
You miss Shabbat mincha.
What to Do
Say ata chonantanu in ma'ariv, but only for the first time you say the amida, not the second time (which is tashlumin).
Situation
You forget to say ma'ariv on Saturday night.
What to Do
Say ata chonantanu on Sunday morning in the second amida (which is tashlumin).

If Doubt about Whether You Said Amida
If you are not certain whether you said an amida:

• On a weekday, assume that you did not say the amida and say it anyway.  Intend that:
  • If you forgot the previous amida, this makes up for it, and
  • If you did say the previous amida, the second one is a nedava (free-will “offering”).
• On Shabbat and Jewish festivals, do not say the amida twice as tashlumin.

            Reason You may not say a voluntary prayer service (nedava) on these days.
Men who intentionally delayed saying shacharit past the fourth halachic hour of the day still say that amida until midday but if they did not say it by midday, they may not say tashlumin. See Minyan: Keeping Pace: Shacharit Minyan.

If you arrive late for any minyan (except ma'ariv) that is about to start the amida, try to finish saying your amida before the leader gets to kedusha, if you can.
If you know you will not be able to finish your amida in time to say kedusha with the minyan:

• Wait for the leader to start the repetition of the amida.
• Say the repetition of the amida word for word with the leader, including kedusha, until the end of the third blessing (ha'el ha'kadosh).
• Once you and he have both finished saying the third blessing, you may continue at your own pace regardless of whether you will finish before or after him.

If for any reason you have not yet finished saying your amida by the time the leader begins saying the reader's repetition, do not say amen or any other replies to the prayer leader's repetition. However, when he begins to say kedusha or kaddish:

• Pause in your own amida and listen without answering or saying anything.
• Once the leader has finished kedusha (that is, he has said baruch kevod adonai mi'mkomo) or kaddish (that is, he has said da'amiran be'alma v'imru amen), resume your private amida.

There are two main types of bowing during the prayer services: 

• Bowing just from the waist (with and without taking steps), and
• Bowing with the knees, plus two variations on Rosh Hashana and Yom Kippur (hands and knees on floor).

I. Waist-Bowing (Two Forms)

• Modim;
• Modim in reader's repetition of amida;
• Bar'chu;
• Lecha Dodi; and
• Alenu.

          To bow this way, keep your legs straight and bend forward from your waist.
    B.  Waist-Bowing/Take Steps, for:

• Amida, and
• Kaddish.

• Bow down from waist with your legs straight.
• Take three steps backward (left foot, right foot, left foot),
• Then:
  • Bow from your waist to the left and say, oseh shalom bi'mromav,
  • Bow from your waist to the right and say, hu ya'aseh shalom alenu, and
  • Bow from your waist to the front and say, ve'al kol yisrael v'imru amen.

II.    Knee-Bowing (Three Times during Amida)

• Beginning of amida's first blessing,
• End of amida's first blessing, and
• Next-to-last amida blessing: ha'tov shimcha.

• Bend knees (at baruch),
• Bow forward (at ata), and
• Straighten up (before God's name).

III.  Knee-Bowing to Floor (Two Forms)
       A.  Knee-Bowing to Floor--Hands and Knees Only

• Kneel (with your back straight up) (at “hayu kor'im”), and
• Bow down with hands and knees on floor (at “u'mishtachavim u'modim”), but
• You are not required to touch your forehead to ground.
  Note You should still bow from your waist (but not to the floor) on Rosh Hashana--even if you are praying alone and even if there is no Torah present.

• Kneel (with your back straight up) (at “hayu kor'im”),
• Bow down with hands and knees on floor (at “u'mishtachavim u'modim”),
• Touch forehead to floor (at v'noflim al pneihem).

Shema
When the minyan reaches the shema in shacharit:

• If you are between bar'chu and end of amida, simply:
  • Cover your eyes like everyone else, but don't say the shema line.
• If you are anywhere else:
  • Pause and, with everyone else, say the first two lines of the shema (Shema, Yisrael… and Baruch shem…), and then
  • Resume where you were.

Reason You may not interrupt your prayer between bar'chu and end of amida.

Amida
Situation  You are saying your amida in a minyan and it is close to the end of the fourth hour of the day.
What To Do  Do not pause, even if the leader says kaddish or kedusha, if doing so will delay you past the fourth hour.