My mother was determined to make us independent. When I was four years old, she stopped the car a few miles from our house and made me find my own way home across the fields. I got hopelessly lost.

Innovation happens when people are given the freedom to ask questions and the resources and power to find the answers.

Train people well enough so they can leave, treat them well enough so they don't want to.

Lead by listening - to be a good leader you have to be a great listener.

Having a good network can be invaluable. It opens doors for you and allows you to enter into opportunities that are beneficial to your business. In this sense, 'who you know' is undoubtedly important, but to me 'what you know' is more important because once an opportunity shows itself, it is up to you to make the most of it, and this is down to your knowledge and skill.

Sometimes the riskiest decision you can make is to do nothing.

Actually, we did a fun April Fools' thing with Google a couple of years ago, which we called Virgle. And we looked for volunteers to go on a one-way trip to Mars.