Peter Barris

We had this unbelievable faith that no business has done, quite frankly, and we tripped along the way doing it, but within two years, we were in 40-plus countries. So we ran at an amazing pace, and this is where venture capitalists play a role. Making Groupon into what it is today, we had no role in it; the entrepreneurs did it.

It has taken me a long time to work out the function of ex-boyfriends, at least for me: how they can help you work out what you want from life and from a partner by showing you what you don't. If a man is your ex, it's better all round if he was not Mr. Right.

The importance of heart health became very real for me when my father died of heart disease seven years ago. Having experienced the loss first hand, I am inspired to do everything I can to break the cycle and prevent families from losing loved ones to this preventable disease.