Getting a year supply of food stored can be daunting. Sometimes when goals are daunting its best to just start with the basics. So below are the basics you need to sustain life if you have nothing else. This list* is for one adult for one year.
Grains: 400 lbs or approx. 72 #10 cans (wheat, rice, corn, rolled oats, spaghetti, etc.)
Legumes: 60 lbs or approx. 12 #10 cans (dry beans, peas, lentils, etc.)
Powdered Milk: 16 lbs or 4 #10 cans
Sugar or Honey: 60 lbs or 10 #10 cans
Cooking Oil: 10 quarts
Salt: 8 lbs
Water (2 weeks): 14 gallons
*This information is from a letter from the First Presidency of the Church of Jesus Christ of Latter-day Saints, dated January 20, 2002.
I would suggest getting a mixture of buckets and #10 cans for the grains and legumes. Have some recipes on hand and practice making them before an emergency. Have the cooking supplies to cook: pots and pans, fuel to cook with, a solar oven, etc. Know how to eat and cook with these items. Wheat berries can be eaten as a hot cereal - no need to have a wheat grinder. If you do have a wheat grinder you can grinder your wheat to make flour to used for breads, tortillas, crackers, etc. Other grains can be made into flours as well. If you can store more water, do it! Remember to rotate this stock pile. Remember this is a list of the items you would need simply to keep you alive - this won't be fancy eating but you will be prepared to survive.