Malcolm Gladwell and Nick Bayliss have both written about the 10,000 hour rule -- it takes 10,000 hours of practice doing something to become really competent. Bill Gates discusses this in a video. The point Bill Gates makes is that it takes more than 10,000 hours of doing something. It takes several winnowing cycles, so only the best and most dedicated are left. I agree with his insight. But I also believe in innate talent having a role in the mix.