text: You need water, shelter, warmth, food, and a plan to get out/be found. But the most important thing is; DON'T GET EXHAUSTED! Sounds trivial, but energy keeps you going to take care of all of the above. It also stops you making foolish, tragic mistakes - there was a tourist lost on the Coromandel Peninsula (New Zealand) not long ago, who had been spotted by a farmer near dusk at the top of a cliff. His body was found at the foot of the cliff.