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.

I hope that my investment into Atomico will become my best financial investment to date.

Feckless as it was for Bush to ask Americans to go shopping after 9/11, we all too enthusiastically followed his lead, whether we were wealthy, working-class or in between. We spent a decade feasting on easy money, don't-pay-as-you-go consumerism and a metastasizing celebrity culture.

When our time's up, it's up. All the money in the world won't buy you one more day.

Harry Potter' created a generation of readers in an era when kids could have disappeared into the depths of the Internet. That's no small feat. Every book series owes J.K. Rowling a debt of gratitude.

I try to do different things as much as I can. I feel like every actor, there's a limited number of tricks and go-tos. The real good stuff you can't get to unless it's something you haven't done before. So I try to make sure each thing is slightly different. Unless it's for the money. Then I don't care.