" Avoid hot stocks in hot industries. • Distrust diversifications, which usually turn out to be diworseifications. • Long shots almost never pay off. • It’s better to miss the first move in a stock and wait to see if a company’s plans are working out. • People get incredibly valuable fundamental information from their jobs that may not reach the professionals for months or even years. • Separate all stock tips from the tipper, even if the tipper is very smart, very rich, and his or her last tip went up. • Some stock tips, especially from an expert in the field, may turn out to be quite valuable. However, people in the paper industry normally give out tips on drug stocks, and people in the health care field never run out of tips on the coming takeovers in the paper industry. • Invest in simple companies that appear dull, mundane, out of favor, and haven’t caught the fancy of Wall Street. "

― Peter Lynch , One Up On Wall Street: How to Use What You Already Know to Make Money in the Market