Ad man Rory Sutherland’s TED Talk at Oxford, Life lessons from an ad man, is one of my favorites. The talk is an entertaining reminder that smart marketing can solve societal problems. Sutherland is currently Vice Chairman, Ogilvy & Mather Group

Advertising adds value to a product by changing our perception, rather than the product itself. Rory Sutherland makes the daring assertion that a change in perceived value can be just as satisfying as what we consider real value — and his conclusion has interesting consequences for how we look at life. –