To be successful, you have to be out there, you have to hit the ground running

Two heads are definitely better than one and by sourcing ideas from each other, you have a better chance of coming up with a strategy that will allow your business to overcome a setback or challenge.

I never get the accountants in before I start up a business. It's done on gut feeling, especially if I can see that they are taking the mickey out of the consumer.

I've been in Africa, and I've been to hospitals of Africa, and they're not hospitals, they're places where people go to die. And rows and rows and rows of people just dying and the waiting rooms of the hospitals are full of people waiting to get into the beds of the people who died the night before, and they're dying from unnecessary diseases.

Brave people don't live forever, but cautious people don't live at all.

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.

It's far more difficult being a small-business owner starting a business than it is for me with thousands of people working for us and 400 companies. Building a business from scratch is 24 hours, 7 days a week, divorces, it's difficult to hold your family life together, it's bloody hard work and only one word really matters - and that's surviving.