this may sound silly to some.. but when I get in a slump I do someting that pumps a lot of oxygen into my system.. My favorite (though not always possible) is to put on some tapes and sing, LOUDLY.. warm up a bit.. and sing your heart out.. I don't think anyone can stay down too long when they get their blood pumping and their brain full of oxygenated blood.. If you don't like to sing, do some exercise, or even deep breathing.. Just get that oxygen in... It's amamzing what a bit of heavy breathing will do for your outlook!