The habit of keeping a Watch List of interesting stocks is one habit of highly successful investors. Personally, I also like to keep track of what’s going on with stocks that I have sold in the past. When I sold Longtop Financial (LFT) from the Cabot China & Emerging Markets Report portfolio in July 2009, it couldn’t have been called a mistake. The stock was nearing the bottom of a decline that took it from a high of 30 in mid-June to a low of 22 in early July. Again, a reminder to always Cut Your Losses Short. And...