I think a book is your calling card, your business card.

Here's how I think of my money - as soldiers - I send them out to war everyday. I want them to take prisoners and come home, so there's more of them.

There are a lot of impractical things about owning a Porsche. But they're all offset by the driving experience. It really is unique. Lamborghinis and Ferraris come close. And they are more powerful, but they don't handle like a Porsche.

Once Michigan stood proud. In addition to GM, Ford and Chrysler, it was home base for the United Auto Workers, a powerful escalator transporting hundreds of thousands of blue-collar workers into America's middle class.

When I start something I bring my A-game - I assume I'm going to win.

I keep anywhere between 5-10 percent of my net worth in venture ideas.

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