We need physical exercise to prepare our brain for long periods of concentration

When I turned 50, something clicked in my head and I said, 'I'm not going to live to 100. I'm half-cooked already.' I set the family down and I said, 'Listen everybody, we're now entering the decade of Daddy. We're going to start doing things that I want to do.

All we do is bring the debate from both sides, and let you as a viewer decide where you want to end up on the issue. That's very important. That's exactly what happens in 'Redemption Inc.'

When you're travelling, your day is jam-packed. I just don't have time to whip out a PC all the time. But I can whip out a BlackBerry and tweet. I keep a constant diary of where I'm at and why I'm there.

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.

I have no baggage in politics. I've never been a politician. I don't owe anybody anything.

Nobody forces you to work at Wal-Mart. Start your own business! Sell something to Wal-Mart!