Downturns are the best time to start businesses because you develop discipline that's very lean and mean in terms of how to spend money. And those habits serve you very well in good times.

What are the most important qualities that make a successful entrepreneur? The ability to communicate. The ability to express your idea with certainty. That's how you become a leader-even if you are unsure, your ability to explain your vision and your direction is the attribute you need the most. ... Articulate your idea in 90 seconds or less.

Downturns are the best time to start businesses because you develop discipline that's very lean and mean in terms of how to spend money. And those habits serve you very well in good times.

When you come to 'Shark Tank,' the only person you should listen to is me, because you know you're getting the truth. I'll decide if it's worth it, and after I'm finished, the rest of the people can look into it.

I'm proud to be on the CBC and to see the management here represents both sides of every story. This is what's unique about the new CBC: you get a Kevin O'Leary on it when five years ago you wouldn't.

Don’t let the dark clouds of greed confuse you

Don't call me, I'll call you... I'm out.