18 minutes – that’s all the time speakers have to present their ideas and thoughts at TED. The range of speakers includes scientists, artists, kids, people like ‘you and me’ and even the occasional former president of the United States. To be invited to speak you must have done, experienced, developed or discovered something that’s interesting and important for other people, and that they would never have heard about if it wasn’t for TED. Obviously, there's a preselection process but in principle no subject is out of bounds. And the talk should be engaging and innovative, motivating and entertaining. Ever since a friend of mine told me about TED some years ago, I never want to be without this fountain of positive thinking.