Success has become synonymous with financial wealth, influence and status. But can we define success in another way — one that welcomes a broader range of accomplishment? It may not be as obvious as you think. In this hour, TED speakers share ideas for what makes us successful. Life coach Tony Robbins describes why failure should not be an option. Psychologist Angela Lee Duckworth says "grit", not IQ, is the new predictor of success. Mike Rowe encourages us not to follow our passion. Ron Gutman shares some compelling research on the hidden power of smiling. And writer Alain de Botton shares a fascinating view about the American paradigm for success and failure.