Sean Achor works with hundreds of the top US companies to boost productivity through improved workplace happiness. He sees sales people perform better, medical staff make fewer mistakes, sickness levels decrease after staff have gone through his workplace happiness programmes. So what is the new happiness theory and how can we apply it? The new happiness theory says that we should start by being grateful for what we have to build a solid core of happiness. What you focus on expands, so as you think about the best bits in your life, like your good friends, your good health, your family, your home, your neighbourhood, your general level of happiness will improve. Then the magic happens! When you become more happy, people around you will sense it. You will become more open to opportunities. And with more opportunities, success will follow, and you will become even happier! A truly virtuous cycle.