“Not all practice makes perfect. You need a particular kind of practice -deliberate practice- to develop expertise. When most people practice, they focus on the things they already know how to do. Deliberate practice is different. It entails considerable, specific, and sustained effort to do something you can’t do well - or even at all. Research across domains shows that it is only by working at what you can’t do, that you turn into the expert you want to become.”