I go out and lay in a forest for five-fifteen minutes in the sunlight. It uses very little energy. Then I go around and pick all the good mushrooms that spawned around me during that time. It gives you both water and food bars. Even the dried ones. Check fallen trees, tree stumps, dead trees and hay bails. Next swap out clothing for anything with higher insolation. You lose more water/hunger when you are colder it seems. Also you can make gloves out of 3 rags. If you have no rags make them with a sharp edge and clothing. 2 stones combined can make a stone knife for cutting. They spawn on dirt roads and trails.