Angry Birds is one of the fastest-growing online products I've seen, growing even faster than Skype, and the company has done a brilliant job of extending it across different platforms and merchandise.

If you want to be an entrepreneur, it's not a job, it's a lifestyle. It defines you. Forget about vacations, about going home at 6 pm - last thing at night you'll send emails, first thing in the morning you'll read emails, and you'll wake up in the middle of the night. But it's hugely rewarding as you're fulfilling something for yourself.

Another differentiator is that Skype is free and simple to set up, and it costs us virtually nothing for a new user to join the Skype network, which is why we can offer the service for free.

When we look at investing, we always think about 'how defensible is this, how likely is it that somebody is going to copy this.' E-commerce tends to be something easy to copy because it's execution.

In film producing, there is an inherent tension between the director, the money and the producer, and that's what keeps it flowing and honest and accountable.

My body is my art, and it's also the tool that I use to make money.

This country, of course, needs fundamental reform of our financial regulatory system, as I, and many other financial institution executives, have publicly advocated for a considerable period.

Most people consider me an optimist because I laughingly state that I would take my last two dollars and buy a money belt.