Gary Resnick, 55 San Francisco, California Research psychologist
"During the tech bubble, I jumped on a high tech stock that was already at a high. Even when the stock plummeted during the tech crash, I hung on for years before I finally got out."
My fix: "I no longer go after hot stocks, or really any stock for that matter. I am much more of a buy and hold investor, and I'm more disciplined. I focus on diversification, stick with a long-term strategy, and keep fees low."