Provident Living gives this suggestion to building up our three month supply,
"Build a small supply of food that is part of your normal,
daily diet. One way to do this is to purchase a few extra
items each week to build a one-week supply of food. Then
you can gradually increase your supply until it is sufficient
for three months. These items should be rotated regularly
to avoid spoilage."
Visit the new Long Shelf Life page for grocery foods that last.