Every once in awhile, find a spot of shade, sit down on the grass or dirt, and ask yourself this question: “Do I respect myself?” A corollary to this question: “Do I respect the work I’m doing?” If the answer to the latter question is NO, then the answer to the former question will probably be NO too. If this is the case, wait a few weeks, then ask yourself the same two questions. If the answers are still NO, quit.