Where do you live? Chances are you don't have to be prepared for "earthquake, tornado, hurricane, whatever. ", I live in Toronto so I am not worried about any of that. Right away you can cut down on a lot.

Right away it will cut down on your supplies, so you should be able to get away with at least a 72 hour kit..Doug's main page has links to government sites etc. that have a listing of supplies, then you can add to it for your specific area.