I'm looking into a way of storing food : 5 gallon buckets with tight lids (with rubber gaskets) to prevent moisture and microscopic organisms from having access to the content combined with an inner liner made of metallized foil (Mylar bags) to block out light. You have to seal the Mylar bag with a hot iron. You also could vacuum pack it. I found this method in the book Emergency food storage & survival handbook by Peggy Layton. It should be similar to this:

http://home.att.net/~ofuzzy1/mylar.htm

I have yet to find Mylar bags and empty 5 gallon pails with tight lids in the local stores... I'm just considering it and apparently it's a very good method of storing food but it's probably especially meant for storing grains though.