Smiley, I've only been trading for 3 years, but I have noticed that my biggest mistake has been lack of patience. I pulled trigger on 200% gains many times now, and four or five months later I could have had a 9 or 10.
Patience and constant attention are important. I missed that drop on HISC the other day because it happened while I was in a meeting. Darned old J.O.B. anyhow..