Key Points Peter Lynch’s advice is invaluable, but one may take it the wrong way. There’s more to “invest in what you know” and steering clear of “di-worsification.” A recent study identified one single habit that doubled Americans’ retirement savings and moved retirement from dream, to reality. Read more here. Peter Lynch is a legendary value investor with the track record to show for it. Indeed, if you're a young, beginning investor, you're probably unaware of the man's incredibly hot run his fu ...