Although my spelling is still sometimes poor, I have managed to overcome the worst of my difficulties through training myself to concentrate.

We must rapidly wean ourselves off our dependence on coal and fossil fuels.

For a successful entrepreneur it can mean extreme wealth. But with extreme wealth comes extreme responsibility. And the responsibility for me is to invest in creating new businesses, create jobs, employ people, and to put money aside to tackle issues where we can make a difference.

The most important thing for entrepreneurs is not to be put off by failure.

Giving back has to do with the way I was brought up and the fact that I've traveled widely and seen terrible situations in the world. To sleep well at night, those of us who are in a position to help must address these situations. I'd get far greater satisfaction out of, say, walking into a hospital I'd built in South Africa than I would by sitting on a beach. I'm fortunate enough to be in a position to make a difference, and I don't want to waste that. I suspect I was also lucky to have parents who drove me from a young age.

A business has to be involving, it has to be fun, and it has to exercise your creative instincts.

No matter where my travels take me, my day starts with a good work out, preferably kitesurfing or tennis. Exercise puts me in the right state of mind for the day. Dedicating time in the morning to exercise your body will make a big difference when you have to focus your mind on the day's work.