This book is kind of a reality check for Malcolm Gladwell's Outlier. Gladwell's 10,000-hour rule sounded like an impossible thing to do, for you to become an expert in a topic because of the sheer number of hours you have to put in. This book gives you techniques, mental models to develop skills and improve in any particular area. The biggest takeaway for me is the deliberate practice as a lens to deconstruct any expert or superstar in a topic and understand them better.