Never go into business purely to make money. If that's the motive you're better off doing nothing.

I set up this magazine called Student when I was 16, and I didn't do it to make money - I did it because I wanted to edit a magazine. There wasn't a national magazine run by students, for students. I didn't like the way I was being taught at school. I didn't like what was going on in the world, and I wanted to put it right.

To be a great leader, you must be a great listener

I've used the Phoenix Centrifuge to replicate what the body's going to go through on the flight up. I've also done some gravity tests with ZERO-G [a charter-flight service in Arlington, Va., that uses modified Boeing 727s to simulate weightlessness], which went great.

Travel the world and meet people. I've been fortunate enough to see so much of the world, and being able to do so has brought me so many wonderful friends and experiences. There is no better way to learn than exploring new places.

I find it very difficult to think of mistakes; not that I don't make any but because I was brought up to look only at the good things in life ... As for what lost the most money, probably Virgin Cola. It is still No 1 in Bangladesh though.

I am a great believer that you need passion and energy to create a truly successful business. Remember many new businesses do not make it and running a business will be a tough experience, involving long hours and many hard decisions - it helps to have that passion to keep you going.