When I was trading stocks I was sort of what the forex people call, a scalper. Trading by the ticks.
I'm very carefull with my feelings, and allow myself to concern about nothing but my system. Greed is not a problem, since I'm not one of those who where drawn to the markets for gambling purposes.
Pipjunky made a excellent point by the "event hazzards", I just found out. On my demo I was trying out my system, and then everything went straight to hell all of a sudden. Partially my own fault for using to large time-frame, but mostly I blame the news.
Thanks for the replies.