Touchy subject, this food storage thing. Frankly, I'm slightly appalled at the apathy creeping into the comments here. Let's get it together people!!
Now. Where do you begin?
Here’s my plan of action:
1. Decide what we eat.You don’t want to store stuff you won’t eat. So figure out what you DO eat. We had a Family Home Evening where we came up with this meal planner:

Everyone was to list their favorite meals. I was disappointed with the results. Breakfast and lunch were okay; in a time of difficulty, we could eat cereal or pancakes every day, and a PBJ or tuna sandwich for lunch would cut it. But dinner is a lot harder. I found it amusing that someone penciled in "cotin candy" and "pumpkin pie". Especially impressive is the tidy D'Nealian lettering.
2. Narrow it down.
Six or seven meals are easy enough to shop for, and can be rotated throughout the course of a few months. It may sound painfully tedious to eat the same 6 things over and over, but consider this:
a. It’s better than government cheese.
b. You are self-reliant and don’t overburden your church and government.
c. You’re guaranteed it’s stuff your family likes and eats.
d. Theoretically, it’s only temporary.
Here’s what ours looked like AFTER Mom did a little revising:
BREAKFAST
Oatmeal
Pancakes
Syrup
Cereal
LUNCH
Tuna
Peanut Butter
Jelly
Crackers
SUPPER
Soup
Chicken and Rice
Chili
Shepherd’s Pie
Enchiladas
Spaghetti
MISCELLANEOUS
Toilet Paper
Soap
Shampoo
Toothpaste
Popcorn
Canned Fruit/Veggies
Flour
Sugar
Salt
Oil
I will probably still need to make some changes to it; add on a few things. It's a work in progress. Much like my entire life.
3. Make your grocery list.
a. Figure out what ingredients you need for the dishes you’ve chosen. Make a master list. If, during this process, you find you’ve chosen recipes that require a lot of fresh ingredients, you need to rethink your choices. For example: Lasagne. Love it. But it requires a lot of fresh cheese. Not something you can easily store. Spaghetti, on the other hand, requires pasta and canned sauce. Easy to store. Yes, you will miss the fabulous taste of your homemade meatsauce, but we’re thinking emergency essentials here.
b. If you have planned seven meals, you will need enough ingredients to make those meals four times a month for three months. So multiply your ingredients by 12.
Next stop: "ANDREA B, COME ON DOWN! YOU'RE THE NEXT CONTESTANT ON THE PRICE IS RIGHT!!" Shopping for the best deal...