A well stocked pantry is a wonderful way to keep your food budget low. The problem lies in remembering what you have and not forgetting what you have bought. A simple way to do this is to write each item that you buy and then put a slash next for the quanity that you have. Then when you use up that item you put a slash the other way (making an X).
<---- I use this free printable . It can be found here. I do the same with my freezer.