1. Two, not one tube
2. cut off the foot portion of a cotton athletic sock and store tubes in it. The sock can be used to cover your hands when handling the chain during flat repair
3. two, not one CO2 cartridge
4. a $1 bill in addition to the twenty. it can be folded and used to line the inside of your tire when you have a hole in the tire (yes, it really works)
5. I'd take the keys, but leave the house and car behind.
6. Forget the ibuprofen and take EPO and HGH instead