The best breakdown of long term food storage I have seen. Start with these basics - CHEAP- and build on that.
LDS- Mormon Food Storage One Day Rations of Bulk Food Storage
Food storage on the cheap: definitely would prefer oxygen absorbers for this; also keep them in a dark place!
DIY Natural First Aid Kit w/Herbs
What Group Poses The Biggest Threat When The SHTF? - Are We Crazy, Or What?
Low-Cost Solar Battery Starter Project - Are We Crazy, Or What?