Sometimes the night before a trading day I have a bad feeling about the next day. It's not that I am worried that it will be a down or up day, since I trade both long and short. It's just the feeling that I am going to screw up. This almost always turns out to be a self-fulfilling prophecy, as was the case last night and this morning. Probably the solution is to not trade when I feel this way, but I feel that I must. I started reading Trading In the Zone this weekend and completely agree with the author's contentions, but I'm not sure how to turn around my thinking.