A little money for a LOT of peace of mind.

If you have any sort of medical condition, the guys at Next Millennium Lifestyles offer a great product for you. USB memory stick in the form of a key or credit card comes with easy-to-use forms where you enter your history. I was able to enter my entire (complicated) med history into the drive in half an hour. Now I just carry it in my wallet wherever I go, and I definitely feel safer if anything goes wrong!