Personal-finance blogger John, who hasn't revealed his last name, has spent the past few years interviewing millionaires.<br />According to Business Insider, John found that many employed a simple three-step strategy to build wealth.<br />The first step is to earn good money. Pick a career path that is both enjoyable and lucrative.<br />Next, once you've earned it, save it! Don't blow it on crap, or go into debt and throw money away on interest.<br />Finally, invest it in low-cost index funds. <br />
