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.

I'm starting to think about things that I want to do, things that are fun. One of them is driving a car like a Porsche. I've driven a lot of cars - sedans, trucks and big family vehicles all year long. But there's nothing like a four-wheel-drive Porsche.

A lot of people have said a lot of great things about Steve Jobs. And for good reason: he built the world's second-most valuable company, with billions in profits and products that have improved every aspect of our lives. But Steve didn't get there by being a soft, fluffy, Kumbaya-type leader.

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.

Money has no grey areas. You either make it or you lose it.

I actually think being an entrepreneur is a state of mind. If you're going to be an entrepreneur, my thesis is that you have to sacrifice everything for some period in your life to be successful. You have to be myopic and completely focused and unbalanced in every way. Once you've achieved success, you're free to do whatever you like.

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.