Above all, you want to create something you're proud of.

Because I don't see Virgin as a company but as a way of life and I fully enjoy it, I don't think I'll ever retire.

When I was 15, I left school to start a magazine, and it became a success because I wouldn't take no for an answer. I remember banging on James Baldwin's door to ask for an interview when he came to England. Then I got Jean-Paul Sartre's home phone number and asked him to contribute. If I'd been 30, he might have said no, but I was a 15-year-old with passion and he was charmed. Making money was always just a side product of having a good time and creating things nobody'd seen before.

Surprisingly, a large number of people who fell out with their partners contacted us, saying that they would love to fly on a Virgle spaceship. But out of April Fools' jokes come real things, and I wouldn't be surprised, within the next 50 years, [if] there are one-way trips heading out into space with people on it. It would be very exciting.

Breaking the rules and challenging convention is in the DNA of every successful entrepreneur.

People are no different from flowers. If you water them, they flourish. If you are not nice to them, they shrivel up

If you are a new startup company, try not to arouse the interest or suspicion of your competition; especially if they are a bigger company. They can crush you while you are still in your startup phase. Lie low while still strengthening your bottom line.