My Silva compass, I often have a spare as well!
Several have mentioned parachute cord...couldn't agree more.
Lined Leather "chopper mittens" in XXL, I use in super cold WI weather from my tree stands..I couldn't do w/o these! I just slip my hand out at my lap for the shot; they work so well!
Diamond brand Strike Anywhere matches...love em, should have them in every pocket, duffle and fanny pack!
My Colman single burner camp stove...I've had it for 38 years and bought it in Kenai AK. It works like the day I bought it!
A Red Head brand goose down vest, I've had for 16 years, it is just large enough to fit over a button shirt. Excellent for cold weather layering and allows for ease of drawing my bow. Light, warm and dry.
Kris