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.

I was a risk-taker as a young man, and I don't regret it. I'm not adventurous in quite the same way now, but I still love the challenge of testing myself to the limits, flying around the world, or seeing if I can be the first to fly a balloon across the Atlantic, or trying to take people into space at an affordable price in an environmentally friendly way. I'll be going into space with three generations of my family!

Well, the odds must be against anybody being able to fly around the world in a balloon on the first attempt. All of us who are attempting to go around the world in balloons are effectively flying in experimental craft because these craft cannot be tested.

Whatever you and your team decide your new brand will stand for, deliver on that promise. That's the only way you'll ever control your brand. And beware: brands always mean something. If you don't define what the brand means, your competitors will.

If you spot an opportunity and are really excited by it, throw yourself into it with everything you've got.

I was fortunate enough, after many visits to many wonderful, weird people to come across Burt Rutan, who is a genius in the Mojave Desert. And SpaceShipOne was born and had three flights into space that won something called the X Prize. And from there, we're building SpaceShipTwo, which is ... a beautiful spaceship that is very, very, very nearly completed and will be ready from about next Christmas onwards to start taking people into space.

If you look for the best in your employees, they'll flourish. If you criticize or look for the worst, they'll shrivel up. We all need lots of watering.