On my person?

I carry a small waist pack, so I am like a woman with a purse.   ;D

Chap stick, small tube of sunscreen, small bottle of sanitizer, my little spiral-bound journal and pen in a Ziplock bag), little waterproof Pentax Camera (unless it is on the lanyard around my neck), extra card and battery for the Pentax camera, tiny pocket thermometer, mini-space blanket, tiny bag with matches, and usually another tiny container with tylenol and/or Vicodin.  Up until last year I also carried Spartan1's blood glucose meter, but last year he had his own waist pack and carried it himself.

In my shirt pocket:  bandana, some TP (I'm a woman, I must have my TP with me), sometimes a little snack, like fruit chews or a bag of almonds.  In pants pocket:  headnet (again depending upon the time of year and if there have been bugs much.  Often it doesn't get used the entire trip but I like to have it in reserve.)