hatchet, cooking pot, lighter, and a winter jacket.
no point in carrying around a sleeping bag when you can use nature stuff as a blanket, also depending on where you are the things you would find useful may change. regardless of that i think about how i would do stranded somewhere all the time, thats why i watch survivorman xD
anyway, the only REALLY, really big obstacle one might face is depression, besides ravenous animals and poisonous plants of course.
bizarro ps: any tool you need you can make.