How long do you want to be prepared for? For evacuation and disaster kits, the standard time given is three days because they say it takes that long for help to reach you. For winter conditions, this would be better extended to the length of time the conditions are likely to make access difficult.
What other problems are you likely to be facing? If the water supply will be limited, try to avoid food that is high in fat and protein and don’t stock salty foods. Will you be able to refrigerate it, cook it or have the facilities to do much preparation?
You may need to consider the weight and space of your food supplies. This is especially important if it needs to be carried. However, many lightweight foods need water to make them palatable and some need hot water such as pot noodles.
How going to store things? Glass can break if not handled carefully. Tins and jars can be heavy.
What are your household’s tastes? Familiar foods can lift morale and give a feeling of security during stressful periods. Consider including comfort foods like chocolate.
Don’t forget the extras that make foods more palatable like salt, pepper, sugar, pickle and ketchup.
Think about what size of item to include in your stores. If you think that you might not have a fridge it would be useful to have items that can be used in a single sitting. In other words, if you only use half a standard tin of baked beans at a time consider having some smaller tins on hand
You need to be well nourished if you are to function at your best. If you are going to depend on these stores for any length of time you need to plan carefully so that you can have meals that give you all the protein, fibre, vitamins minerals etc. that you need. If necessary, you could include nutritional supplements to your stores.
Extreme survivalists include the means of providing themselves with food such as snares, traps fishing lines.
Remember that you need to use what you store and store what you use. This way you will rotate your stocks rather than gather things, which are not used and are just wasted. There is little point putting aside food for an emergency and then finding that it is unusable because the use by date was years earlier.