How did Leonardo Da Vinci become a master of fields so diverse as anatomy, physics, dentistry, art, music, astronomy, engineering, and many, many more?   It's a question worth asking. If we can capture just a percentile of his brilliance, we can contribute and accomplish a lot in our lives.   Da Vinci made discoveries that were centuries ahead of his time, despite lacking a formal education. Some accounts of history suggest, however, that his brilliance might be because of the lack of formal education.   Circulation.   So let's start with something that he was surprisingly wrong about. That's weird to say isn't it? In Walter Isaacson's

For years I've listened to the Tim Ferriss Show, and listened to business speakers discuss the importance of not taking just any customer. That focusing on the right customers is important as anything.   Whilst the message was in my ear, I never implemented it. That is, until I got a whole heap of problematic clients that drained all my time and energy. They wanted everything done when they said so, and they pestered me all the time.   Finally, I began cutting them. I learnt the lesson, because I earnt it, through pain and mistakes. Through experience, I l-earnt it.   I could sit down