10,000 hours of practice is required to achieve the level of mastery associated with being a world class expert in anything.
10,000 hours is equivalent to
3 hours of practice a day
or
20 hours of practice a week
over 10 years.
The more experiences we have with something, the stronger the memory or learning trace for that experience becomes.
-Daniel J. Levitin
This is your Brain on Music
Musings from the Moonroom 