Great question — answering as the UphillTech team:
In most cases, and certainly in this one, you want to go downhill following water if at all possible. Downhill will take you to civilization in almost all cases, as humans have tended to settle in the valleys and not on the mountaintops. Going downhill will also help one find more water , as streams get bigger the farther downhill you want to go. The other thing one could do is to use the sun to find directions and just go in one direction instead of wandering in circles - but this has its own problems, and the sun can be blocked by clouds. The important thing is to not give up and to remember that ultimately you are responsible for your own safety.
Full answer by Charlie Brumbaugh: https://outdoors.stackexchange.com/a/20769 (CC BY-SA 4.0).
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