The one thing I have learned as a CEO is that leadership at various levels is vastly different. As you move up the organization, the requirements for leading that organization don't grow vertically; they grow exponentially.

I think real estate is really core, but you just nailed why I'm still here and loved retail - it's because of the breadth of it. I didn't appreciate how interesting retail was until I got started. You have to have a customer relationship, but you need leadership skills, servant leadership characteristics.

It's hard to keep things moving. And that's always a big trick. I think for me, the key is setting really big goals. And, you know, with YouTube, I think we've had tremendous leadership, both with the founders and now with Salar, who's been running it.

If I have three good decisions a day, that's enough.

Focus on the big decisions. "As a senior executive, what do you really get paid to do?" he asks. "You get paid to make a small number of high-quality decisions. Your job is not to make thousands of decisions every day.

I'm the non-executive chairman of nine or so major companies, and on the nine companies, it's a little trying because you jump from one industry to another, as the case might be. But one had the reasonable knowledge of those nine activities, and it's been an exciting job.