There are some places best avoided. Stay away from low ground if you can: these areas get cold and damp at night. Thick undergrowth is often infested with insects; check for snakes, scorpions, spiders and other pests. And wherever you settle, make sure there's nothing loose above that can fall on you in a storm.
No matter where you find yourself, remember that the effect on your morale of having a place tp 'come home to', even if it's only a lean-to made out of brush wood, could mean the difference between life and death. Your will to live is what will really keep you alive, and anything that strengthens it is another stroke in your favour.