Quote from opm8:
Ari Kiev's "The Psychology of Risk" talks about this kind of thing. What he recommends (and I've put it to good use, too) is: keep a journal of your emotions during trading, including the time of day when you felt what you did.
Since you can't always experience a feeling without the emotional hit you can at least keep track of how you feel throughout the day. The benefit is that you will see how short-lived your emotions are. You might feel panicky and in a cold sweat at 11:00 AM but by 11:25 it's all gone. Once you know what to expect from your body you will realize that all emotions are a passing phenomenon and no matter how bad you may be feeling now it won't last for too long. It's useful to know how long to expect before you have a clear head again.
opm8