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.

I spent a lot of my early blogging career sort of highlighting all the ills of the government in Kenya and all the corruption and problems.

Getting 'SNL' was pretty amazing, so just to be able to have an eight-year career there and be really happy with everything I did, it was pretty big.

I sold 'Hattie Big Sky' without an agent but quickly realized a writing career required an agent.

If you're an artist, create music and put it out on the Internet. If you do this consistently, your fan base will continue growing, and that will power your entire career.