When you get tired from many hours of running and going full steam ahead, take a few extra hours and get a little extra rest. It will make a huge difference in your health, your attitude, and your energy. The amount of sleep that you get has a direct correlation to the type of energy and the amount of energy that you put out. So make sure that when you're tired, that you take care of yourself to impact your output of energy. After all, it's the right thing to do and it models the way for others.