Usually I would say a standard fire kit (lighter, cotton balls, germ x) or medical kit (quick clot, gauze, band aid, medical tape, small tourniquet) but it seems like everyone is going to put those even though I do like the sound of the med. kit for a change instead of a fire kit. A multitool would is always nice and useful , any Leatherman (wave) would work really. Now if it fits and I do not know a 100% if it will fit, but if it does then my entry is a deck of cards. If you have a deck of cards then there is so many games you can play. It can keep up moral and is overall a good time when your in the woods (Having people to play with helps but is not always necessary depending on game).