like some others I carry my driver's license, a credit card, and a 20 dollar bill in a thin plastic wallet in my jersey pocket. I have my old GI(government issue) dog tag which has my GI serial no., blood type, religious affiliation, and name. The GI dog tag also has a notch to keep your mouth open so one's body will not bloat in case you are not alive for awhile. I might wear the dog tag on a solo century or a mountain ride, hopefully for the blood type info only. I usually have a cell phone in the energy bar pouch in the Bento bag. The cell phone will have all the pertinent phone nos. which most people should be able to figure out.

Sinch