When I was 15, I left school to start a magazine, and it became a success because I wouldn't take no for an answer. I remember banging on James Baldwin's door to ask for an interview when he came to England. Then I got Jean-Paul Sartre's home phone number and asked him to contribute. If I'd been 30, he might have said no, but I was a 15-year-old with passion and he was charmed. Making money was always just a side product of having a good time and creating things nobody'd seen before.

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.

Anyone who makes an effort at whatever they hope to accomplish can, and will, seriously improve their chances of succeeding.

However small a company, its founders should try to expand people's opportunities and choices.

Companies need to have a lot more flexibility with their people... . If somebody wants to golf around the world for two months, okay, well, maybe on an unpaid basis, let them do it. That sort of flexibility I think is incredibly important because most of our time, we spend at work.

Whether you are launching a start-up or leading an established company, you should start establishing your social media presence if you haven’t already.

Starting a business is a huge amount of hard work... You had better enjoy it.