20 Stock Investing Tips 20 Stock-Investing Tips Our stock analyst staff has nearly a thousand years of collective investment experience. In this final lesson of the stocks Investing Classroom, weve boiled down some of our most salient observations into 20 suggestions we think will make you a better stock investor. 1. Keep It Simple. Keeping it simple in investing is not stupid. Seventeenth-century philosopher Blaise Pascal once said, "All mans miseries derive from not being able to sit quietly in a room alone." This aptly describes the investing process. Those who trade too often, focus on irrelevant data points, or try to predict the unpredictable are likely to encounter some unpleasant surprises when investing. By keeping it simple--focusing on companies with economic moats, requiring a margin of safety when buying, and investing with a long-term horizon--you can greatly enhance your odds of success. 2. Have the Proper Expectations. Are you getting into stocks with t...