… those investors who have succeeded the most over the long run (Warren Buffett, Peter Lynch, etc.) have typically practiced the same investment style in good times and bad. A good “value” investor, like Buffett or Lynch, sticks to his or her style whether indexing’s popularity waxes or wanes. A good “growth” investor also remains committed to his or her style. These two investment approaches will likely prosper at different times, but what counts the most in achieving long-run success is … well, the long run. Simply put, successful investors are good at what they do, and they practice discipline.