Principles:<p>1) Asset allocation: Basically, how much you want in stocks, how much in bonds. Those are the two major asset classes. Go way heavier on stocks early in life and maybe trend toward 50-50 later in life when you have less time to ride out dips.<p>2) Diversification: What specific entities you invest in. Suggestion: Total US stock market index, total world non-US stock market index, total US bond market index. This way you don't have to pick winners. You just buy everything. Let the bad stuff drop off along the way, and let the good stuff do its thing.<p>3) Rebalancing: Like once a year, or every time your chosen asset allocation gets at least 5% off. Whatever feels good, but keep your asset allocation under your own conscious control.<p>As a note, Ric Edelman, when he had a radio show, went over the IRA to Roth conversion. Several times. According to him, it's a wash. Pay tax before you invest or when you withdraw, but either way the net effect is almost identical.<p>I like silexia's comment. There is a lot of information not included in the story, and, if you think about it, this whole story is one data point. One guy did some things/had some things happen at a particular time in history. Don't expect to cut and paste into your own life and get rich by next week.<p>Important points:<p>1) Start as early as you can.<p>2) Be religious about regular investing without fail.<p>3) Never break into the piggy bank to buy a house or a fancy car, or for any other reason short of a dire medical emergency.<p>4) Take advantage of every break you can find, and any employer matches.<p>5) Wait.<p>There is a huge amount of information at Bogleheads Investing Advice and Info ( <a href="https://www.bogleheads.org/" rel="nofollow">https://www.bogleheads.org/</a> )