If you want a “knowledge worker” to be as ineffective and produce the lowest level of quality possible, deprive them of their sleep and hold them to an unrealistic deadline. In other words, activate Crunch Mode. via Chad Fowler.
Debunking the Myth of the 10,000-Hours Rule: What It Actually Takes to Reach Genius-Level Excellence You can do something for 10,000 hours and still be bad at it. Expertise requires intentional practice.