On my person, I carried the following:

map
compass
pocket multitool - Leatherman Micra
8X monocular
survival kit (for a list, see Survival Kit)
signal mirror
whistle
chapstick
walking stick
bandana

lunch
extra socks
spare glasses
antibacterial hand gel
mosquito repellent
water bladder, in the top compartment of the pack
water bottle
water filter
gore-tex parka
rain pants
flashlight
gloves
polypro shirt
polypro bottoms
toilet paper
cathole spade
emergency space blanket
strobe light
cyalume stick
first-aid kit
big leatherman