Self-made billionaires are something to behold, their ambition and drive to achieve their status as the richest men and women in the world is a feat to be learned from. Many of us wonder how men like Carlos Slim Helu, the richest man in the world, knew where to start and what to buy and sell in order to get to where he is today. Dubbed the richest man in the world by Forbes, Helu’s net worth accounted for $63.3 billion in 2011.