What's the most critical factor in any business decision you'll ever have to make? Basically, it boils down to this question: If this all crashes, will it bring the whole house tumbling down like a pack of cards? One business matra remains embedded in my brain - protect the downside.

You shouldn't be looking for people slipping up, you should be looking for all the good things people do and praising those.

Enjoy life - you only get one.

Engage your emotions at work. Your instincts and emotions are there to help you.

We'll not be sending anyone into space before it is safe and the vehicle is well and truly tested.

It is only by being bold that you get anywhere. If you are a risk-taker, then the art is to protect the downside.

I have always lived my life by making lists: lists of people to call, lists of ideas, lists of companies to set up, lists of people who can make things happen. Each day I work through these lists, and that sequence of calls propels me forward.