fm,
In addition to all of the other fine recommendations:
1. Do a search on this site for $50 survival equipment test, or something like that (I'm sorry, I just don't remember). It was about the middle of last year.
2. Make sure you have enough blankets for your household assuming you have no heating.
3. Do look into a genuine Victorinox/Wenger SAK with lots of tools they start in the $10+ bracket (i.e., well under $20). And don't forget an inexpesive knife sharpener. WallyWorld has a good $5 Ezelap diamond rod (well at least I like it & have it in our BOBs).
4. I know Tom already mentioned this but do be sure to get a compass & some maps of your region. You never know when you'll decide you need to leave it.
5. Be sure to get alternate heating/cooking/lighting equipment & supplies.
6. You can add SW radio capability to AM/FM for about $50 more or less at Radio Shack.
7. Get a few more butane disposible cigarette lighters.
Good luck & God bless,
John