One of the pamphlets that The Church of Jesus Christ of Latter-Day Saints released in early 2007 is All Is Safely Gathered In: Family Home Storage. Four principles are emphasized:
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.
Store drinking water for circumstances in which the water supply may be polluted or disrupted. If water comes directly from a good, pretreated source then no additional purification is needed; otherwise, pretreat water before use. Store water in sturdy, leak-proof, breakage-resistant containers. Consider using plastic bottles commonly used for juices and soda. Keep water containers away from heat sources and direct sunlight.
Establish a financial reserve by saving a little money each week and gradually increasing it to a reasonable amount (see All Is Safely Gathered In: Family Finances guide).
For longer-term needs, and where permitted, gradually build a supply of food that will last a long time and that you can use to stay alive, such as wheat, white rice, and beans. These items can last 30 years or more when properly packaged and stored in a cool, dry place. A portion of these items may be rotated in your three-month supply.
There is a letter from the First Presidency that is included in the pamphlet:
"Dear Brothers and Sisters:
Our Heavenly Father created this beautiful earth, with all its abundance, for our benefit and use. His purpose is to provide for our needs as we walk in faith and obedience. He has lovingly commanded us to “prepare every needful thing” (see D&C 109:8) so that, should adversity come, we may care for ourselves and our neighbors and support bishops as they care for others.
We encourage Church members worldwide to prepare for adversity in life by having a basic supply of food and water and some money in savings.
We ask that you be wise as you store food and water and build your savings. Do not go to extremes; it is not prudent, for example, to go into debt to establish your food storage all at once. With careful planning, you can, over time, establish a home storage supply and a financial reserve.
We realize that some of you may not have financial resources or space for such storage. Some of you may be prohibited by law from storing large amounts of food. We encourage you to store as much as circumstances allow.
May the Lord bless you in your home storage efforts.
The First Presidency"