I can't believe this one hasn't been mentioned yet- an EMERGENCY BLANKET AND SMALL FIRST AID KIT. I never go into the boonies by myself without these. I also carry ORANGE TAPE so that I can mark the trail back to my kill if I run out of light and have to come back the next day to recover it. Lastly, I carry one of those nylon web harnesses for dragging out my animals. It sure saves a lot of time.