Got some time? The 10,000 Hour Rule.

 

In Malcolm Gladwell's book Outliers: The Story of Success he repeatedly talks about the "10,000 Hour Rule", claiming that the key to success in any field is a matter of practicing a specific task for a total of around 10,000 hours.

Gladwell claims that greatness requires enormous time, using the source of The Beatles' musical talents as an example. The Beatles performed live in Germany