Every business, like a painting, operates according to its own rules. There are many ways to run a successful company. What works once may never work again. What everyone tells you never to do may just work, once.

As people's access to the internet grows we're seeing the sharing economy boom - I think our obsession with ownership is at a tipping point and the sharing economy is part of the antidote for that.

Learn to look after your staff first and the rest will follow

Of course, a lot of businesses want to reach students, so I funded the magazine by selling advertising. I sold something like $8,000 worth of advertising for the first edition, and that was in 1966. I printed up 50,000 copies, and I didn't even have to charge for them on the newsstand because my costs were already covered.

Space travel will be like every other business. There will be competitors. . . . Thirty months from now, I'm confident we'll be flying people into space.

I think business leaders all over the world should not just think of how we can make lots of money, which is fine, but to take some of the problems in the world and get out there and tackle them using business. I think that if businesses do that we can get on top of these problems.

The best advice I ever received? Simple: Have no regrets.