Take a nap. Of course, during hunting season, you're building up a debt as well. For sportsmen who hunt on weekends and work during the week, a good way to pay it back is through naps after work. For days in the field when yyou can't stay awake, Roth says that Bestul's catnap was a good idea, though its timing proved unfortunate. "When you get hungry, your body is giving you a biological signal to eat," says Roth. "When you get sleepy, what's the biological signal? It's not saying to slap yourself on the face. It's telling you to go to sleep." A short rest of 10 to 20 minutes can help clear your brain temporarily of a chemical called adenosine, which induces grogginess.