My Food Storage Quest

For a long time I have been trying to organize my 3 month food storage. I have decided to try lots of different methods and then abandon them when I realize it won't work for me. I have a few things that are working, but it's not all there. This is reminding me a lot of programming because I'm doing a lot of guess and check. Here's what I have so far. I've gone through my recipes and pick out the family favorites that I want to have a 3 month supply of. I only have about 20 now but I'll eventually get it up to 30. I found an excel file that keeps track of what is needed for each meal and then the total amounts needed. I was planning on having a box for each meal with all the non perishable foods needed for 3 meals (including spices measured out). That way I would always know I had enough. I knew buying 30 boxes would be expensive, but if it worked it would be worth it. I found some boxes at home depot for $.99 and I bought 15 to try. I was thinking about this plan and then realized I didn't want spices sitting around for that long since I wasn't going to only eat these meals. Now I have a lot of boxes and no real plan. I'm going to try putting similar items in a box since I know how many I need. I think the only way I'll get there is to keep doing guess and check until I get something that works for me. Any Advice?