First, while it may seem obvious, it is important to eat the food from your fridge first, the freezer next, and after that move on to foods you may have stocked in your pantry. Do not discard frozen and refrigerated foods right when the power goes out. I was surprised to learn that foods from a well-stocked freezer will last up to 48 hours!
Second, make sure you have a manual can opener. Although it seems obvious, it is easy to forget that your electric can opener will not work.
Finally, stock up on some tasty condiments and seasonings. Certain condiments like mustard, ketchup and relish are good for days with no refrigeration. And these will help you spice up the usually bland pre-packaged foods.
Oh and one last note – grab some powdered milk. Even if you’ve forgotten the hand cranked can opener, you can always just add water and have the breakfast of champions anytime of day.