Oh and I forgot to add that I always have on me my little Altoids tin RX kit. This little kit gets used a lot. It consists of:

1-GermX wipe.
10-Tylenol
4-Ibuprofen
4-Aleve
4-Benedryl
2-Imodium
6-assorted band-aids
1-Classic SAK sharpened to a Warncliff blade profile with a needle tip.
6-Zofran dissolving tablets (these are the BEST thing for an upset stomach. If you are prone to an upset stomach, have your doctor give you an RX for these, but get the dissolving kind. You just put one between your cheek and gum.
6-Hydrocodone (I'm a real druggie, I've used maybe 36 of these in the last 2 and a half years), but they are handy to have.