If I could distill the essence of trading, good to great trading, this is the key concept. If you feel yourself sitting in a trade and its eating at you, get out. Look for the next pile of money thats under the next rock, and go pick it up. If its not there, look somewhere else. The more often you get off your ass and move on, the brighter everything gets. The key is, then, developing this skill, cutting and moving on, to the best degree that one can. To me, this is the key behavior in trading well. How you train yourself to do it is your life's work.