If you fell asleep for more than 30 minutes in the middle of a meal:

• Wash again and say ha'motzi again, and then say birkat ha'mazon, OR 
• Eat other items with a fore-blessing and after-blessing (since your previous eating is finished).

• Say birkat ha'mazon if you are:
  • Finished eating, and
  • Not hungry again, after having been satiated at the meal.
• Do not say birkat ha'mazon if you are
  • Finished eating, and
  • Hungry again (after having been satiated at the meal), as the original snack or meal is irrelevant to any after-blessing now.

If you fell asleep for more than 30 minutes in the middle of a meal:
Step 1: Wash your hands the Three-Times Method to remove the tum'a of your sleep.
Step 2a: To Continue Eating
To continue eating in this case, since the previous blessings and food are no longer relevant (due to hesech da'at), you may:

• Wash again and say ha'motzi again, and then say birkat ha'mazon, OR 
• Eat other items with a fore-blessing and after-blessing (since your previous eating is finished).

Step 2b: If You Are Finished Eating

• Say birkat ha'mazon if you are:
  • Finished eating, and
  • Not hungry again, after having been satiated at the meal.
• Do not say birkat ha'mazon if you are
  • Finished eating, and
  • Hungry again (after having been satiated at the meal), as the original snack or meal is irrelevant to any after-blessing now.

Say the fore-blessing borei minei mezonot on non-bread foods if:

• Grain
  The Five Grains (wheat, rye, oats, barley, or spelt) make up at least 20\% of the food's flour volume, AND
• Cooking Method
  Food is cooked or baked, AND
• Meal or Snack
  You intend to eat the food as a snack and not a meal.
  Note If you intend to eat a full meal that includes mezonot of a cake-like or bread-like texture, say ha'motzi.
  For basing the fore-blessing on the main or preferential ingredient in a food mixture and/or saying two fore-blessings, see Fore-Blessings (Bracha Rishona): Food Mixtures: Main Ingredient  and Introduction to Food Fore-Blessings (Bracha Rishona): The Five Grains.

You must say the blessing which was designed to be said on each type of food. B'diavad, a lower level blessing will still cover the food.
From lowest to highest level, here are the food fore-blessings:

• She'hakol,
• Borei pri ha'adama,
• Borei pri ha'eitz (on common fruits),
• Borei pri ha'eitz (on the Five Special Fruits)

You may leave the sukka due to extreme cold or heat, rain, or bees. You should not stay in a sukka if it is raining or very cold or will otherwise make people suffer.
If it is raining on the first night of Sukkot and the rain is sporadic, wait until midnight before saying kiddush indoors.
If it is raining on the first night of Sukkot and the forecast predicts rain all evening, you do not need to wait to see if the rain will stop before saying kiddush. Instead:

• Say kiddush in the sukka (without saying leisheiv ba'sukka), even in the rain.
• Wash hands and say ha'motzi.
• Eat at least 1.3 fl. oz. (39 ml, or 1/6 cup) of bread in the sukka.
• Go inside the house and finish your meal inside. 

When washing your hands before eating bread, the ideal procedure is to wash, say the blessing al netilat yadayim, and then dry your hands (since the drying is part of the washing procedure). Many people have the custom of pouring water onto each hand twice but only before eating bread.

The fore-blessing (bracha rishona) must be said where you eat.  However, sometimes you may begin eating in one domain and continue eating in another domain. A domain may be any physically limited area (car, house, restaurant, office building) or the outdoors (highway, park, etc.). Once you left the first place, you are considered to have had an interruption of thought (hesech da'at) and are no longer eating that original snack or meal. 
Whether you say a new fore-blessing depends on your intention when you said the fore-blessing:

• Do not say a new fore-blessing if you had intended to go to the second place, as long as the food at the second place is in the same food categories as what you already blessed on at the first place.
• Say a new fore-blessing if you had not intended to continue eating in the second domain, even if you had planned to return to that first place and continue eating.
  Exception You do not need to make a new fore-blessing if:

  • You return to the first place and even one person who was eating with you is still there, OR
  • You had eaten bread or mezonot and then left but had not said the after-blessings of birkat ha'mazon or al ha'michya, even if no one is left from before.
    Reason Since you are required to say birkat ha'mazon or al ha'michya, you are still considered to be continuing your meal.

    Note As long as you are under the same roof, do not say new blessings on food at the new place (such as when switching seats or even rooms in a restaurant).

    Exception Even if you washed your hands and said ha'motzi at the first place, say a new blessing on food that would have required a new blessing at the first place, such as new wine or any dessert other than mezonot.