>>1490386>USE A PAPER FUCKING MAP.This.
I mean, seriously, print a A4 or A3 of some area just to get some idea of what's nearby, one paper sheet weighs next to nothing. Put it in a ziplock bag and keep using your phone/GPS/whatever if you want to.
Anyway, these are pretty basic stuff and make anyone's life easier and safer:
>Map>Compass>Knife>Lighter>Headlight