Personal Question: Malcolm Gladwell talks about how it takes many hours of practice to learn proficiency and become an expert in anything. In his book, Outliers, he quotes neurologist Daniel Levitin as saying "The emerging picture from such studies is that 10,000 hours of practice is required to achieve the level of mastery associated with being a world-class expert—in anything.” If expertise is based on the time we've practiced something, what have you spent considerable time practicing? What else do you want to develop expertise in? What do you need in order to start?