The stock market is always trying to separate you from your money. Everybody knows that. What some people may not know is that the market is equally good at separating you from your sanity. My favorite crazy-making tactic on the part of individual stocks is the issue that trades sideways for weeks and then breaks out with a 10% gain in one day. I tell myself that I can’t buy it now because it’s too extended. So I figure I’ll buy it when it corrects tomorrow. Tomorrow comes and the stock continues to soar. Now I really can’t buy...