The definition of leadership is that you have to find great people and ask them to do extraordinary things. I've been doing that my whole life.

As far as I'm concerned, Twitter has wiped out Facebook. I'm done with Facebook.

I'm not going to leave Canada, I'm going to fix it.

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

In his first term, President Barack Obama played a cautious manager navigating the worst economic disaster since the Great Depression and cleaning up the messes left by President George W. Bush in Iraq and Afghanistan.

The biggest mistake entrepreneurs can make is trying to do everything themselves. They usually blow up when they try. I did an inventory of every deal I've ever done and it turned out that every single deal I made money on was a partnership, and every colossal failure, where I lost millions, was something I tried to do by myself.

Vision is nothing without a plan to execute it.