Variety is the spice of life, so make sure when you are prepping; you get a wide-range of things. Getting only wheat flour might get boring after a while and could be dangerous if someone is allergic to it. So it is a good idea to have a variety of grains to use, as well as a grinder that you can turn dried food into flour-like substances to aid in supplementing nutrition.
Another best practice is to store a variety of foods in a single bucket. So, for example, instead of creating a bucket filled with a single food type, create a bucket that include a variety of foods plus appropriate condiments. If you are ever forced to use your food storage, you can pull a single bucket with everything you need to get by instead of riffling through a dozen or more buckets to gather what you need for meal-preparation.