This is regarded as the main text that brings the now well known concept of 10,000 hours need to be spent via deliberate practice to become a world-class expert at a skill. Skills are wide ranging such as computer programming or playing the violin. Mentions interesting case studies backing this from Bill Gates to the Beatles. So there you have it, three hours per day is what you need to put in for ten years dedicated to one skill is what you need to do to become an expert.

book review
Unbreakable by Ronnie O’Sullivan
Key Lessons from a Snooker Legend Ronnie O’Sullivan is widely regarded as the greatest snooker player of all time, with a record-breaking career spanning decades.