Are we naked for this?
Cause I usually have a knife, flashlight, and lighter in my pocket and a smart phone on my belt,
I'm gonna assume the phone dosn't work because if you're "stranded" and your phone works then you're not really "stranded".
I'm gonna assume I'm appropriatly dressed for the climate but missing the contents of my pockets except for my Identification so I don't get deported if for some reason I'm "rescued" by cops from Arizona.
With that scenario and not including things that I'm not likely to be in possesion of like sattilite phones I'd go with;
A Leatherman Multi tool.
A Magnisim Fire Stick.
One of them old school Metal Canteens.
A tarp, 10 by 15 sounds about right.
Then fill the rest of the backpack with one piece of parachute cord as long a nessesary to fill the remaining space, should get like a thousand feet if the tarp hasen't been taken out of the package yet.