Today, Warren Buffett is one of the richest people in the world - a $149 billion net worth. He built that fortune by compounding Berkshire Hathaway at a 19.9% rate a year for the last 60 years. That’s nearly double the return of the S&P 500 Index.Warren Buffett was doing what most people aren’t doing today: Value investing. And Buffett's secret to achieving such enormous gains was to pick companies that could greatly grow their earnings without spending much additional capital. For most of his career, he had a mentor, a coach and a close friend, Charlie Munger whom he could bounce ideas off of (yes, having a mentor and partners are important). Together, they looked for wonderful stock ideas to accumulate. Think about the big entrepreneurs on Forbes who sold software, ran furniture comp