Its good to recognize the downfalls of trading. I would recommend learning to control your emotions and not to get caught up on what could have happened and react to work did happen.

A technique to use is to keep a journal of what you would of bought at and why. Express how you were feeling. Ans then write about what you would sell at and why.

Trading is a two way street, you can't feel the joy or the heartache. And when you learn to take the emotion out, you find yourself making the right moves more often.