Never depend on those luck moments – they are gifts – but instead always build your own back-up plan.

As a young boy, scouting gave me a confidence and camaraderie that is hard to find in modern life.

I've never really had a TV career. I've been a soldier and a climber.

I've eaten sheep's eyes, the still hot meat from a zebra killed by a lion, and maggots which give you 70 calories to the ounce.

The hardest thing about my job isn't the snake bites or the crocodiles, it's being away from my children. I have a really religious satellite phone call every day back to the boys, wherever we are, whatever time zone, to say goodnight.

And if you give your heart to a goal, it will repay you. It's the law of the universe.

Our achievements are generally limited only by the beliefs we impose on ourselves.