" Moderately fast growers (20 to 25 percent) in nongrowth industries are ideal investments. • Look for companies with niches. • When purchasing depressed stocks in troubled companies, seek out the ones with the superior financial positions and avoid the ones with loads of bank debt. • Companies that have no debt can’t go bankrupt. • Managerial ability may be important, but it’s quite difficult to assess. Base your purchases on the company’s prospects, not on the president’s resume or speaking ability. • A lot of money can be made when a troubled company turns around. • Carefully consider the price-earnings ratio. If the stock is grossly overpriced, even if everything else goes right, you won’t make any money. • Find a story line to follow as a way of monitoring a company’s progress. • Look for companies that consistently buy back their own shares. "

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