Mark Cuban

"Sweat equity is the most valuable equity there is. Know your business and industry better than anyone else in the world. Love what you do or don't do it."

"I still work hard to know my business. I'm continuously looking for ways to improve all my companies, and I'm always selling. Always."

"Being rich is a good thing. Not just in the obvious sense of benefitting you and your family, but in the broader sense. Profits are not a zero sum game. The more you make, the more of a financial impact you can have."

"The number-one job of the hedge-fund manager is not to make sure that you can retire with a smile on your face - it's for him to retire with a smile on his face."

"I hate politics. It's slimy. Any job where people pander for votes, I don't like. The country has gotten so partisan that if you're not on my side, you're the enemy. The only thing I ever try to support is a third party, like Unity08. We need more parties and more choice."

"It is so much easier to be nice, to be respectful, to put yourself in your customers' shoes and try to understand how you might help them before they ask for help, than it is to try to mend a broken customer relationship."