This is simply an expression of "Deliberate Practice"
http://freakonomics.blogs.nytimes.com/2007/08/20/how-talente..."""A while ago, we wrote a New York Times Magazine column about talent — what it is, how it’s acquired, etc. The gist of the column was that “raw talent,” as it’s often called, is vastly overrated, and that people who become very good at something, whether it’s sports, music, or medicine, generally do so through a great deal of “deliberate practice,” a phrase used by the Florida State psychologist Anders Ericsson and his merry band of fellow scholars who study expert performers in many fields.
As we wrote, there are at least three key elements to deliberate practice:
1. Setting specific goals.
2. Obtaining immediate feedback.
3. Concentrating as much on technique as on outcome.""""