So I became a publisher by mistake - well, not quite by mistake, because I wanted to be an editor but I had to make sure the magazine would survive. The point is this: Most businesses fail, so if you're going to succeed, it has to be about more than making money.

Please don’t get hung up on this question of whether you need to have experience in an industry before you launch your startup.

Customers shouldn't just think of your business as a place to buy a product or use a service - it should be a fun place to be.

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

The funny thing is people won't let me pay for things. I'll be in a restaurant and the manager will say, 'Oh no, it's on the house.'

Everyone needs something to aim for. You can call it a challenge, or you can call it a goal. It is what makes us human. It was challenges that took us from being cavemen to reaching for the stars.

I am impressed with just the enthusiasm for life and the fact that some of these people are in their 80's, even 90's, and they're absolutely determined to get out there and make a difference.