2. Alexa von Tobel

Alexa von Tobel is the founder and CEO of LearnVest.com, an award-winning personal finance website. Von Tobel came up with the idea for LearnVest in 2006 while a student at Harvard Business School when for the first time she realized that she and most other people had never had any formal education about how to manage their personal finances. She had a bit late realization about money which was that you need a plan for your money.

Alexa von Tobel said that "I was lucky enough to learn this lesson while still in my 20s, so I had time to put a financial plan into place for myself (and start LearnVest to help people nationwide do the same!)."

3. Mark Cuban

Born in Pittsburgh in 1958, entrepreneur Mark Cuban has ventured into many diverse businesses, from theater chains to Internet startups. In 1990, Cuban sold the firm CompuServe for $6 million, one of his largest early business ventures. Cuban was a hard worker. At the age of 12, he sold sets of garbage bags to save up for a pair of shoes he liked. In high school he earned extra dollars any way he could, mainly by becoming a stamp and coin salesman. Cuban expressed interest in buying the NHL's Pittsburgh Penguins. But one late realization that he had in his life is to learn to manage owns credit cards.