"Shark Tank" investor Kevin O'Leary has a simple secret for staying motivated: he loves proving people wrong. "I just love it when people tell me, ‘Oh, you can't do this, you can't do that,'" O'Leary recently told Fortune.
"When someone tells me I can't do it, I turn around, two years later, kick their ass," he continued. "That's a great motivation. It's not about the money anymore—I just like kicking their ass." O'Leary shot to fame on "Shark Tank," where his tough negotiating style and his acerbic wit earned him the nickname "Mr. Wonderful."
