The emerging picture from such studies is that ten thousand hours of practice is required to achieve the level of mastery associated with being a world-class expert -- in anything. ... Ten thousand hours is equivalent to three hours a day, or 20 hours a week, of practice over ten years... It seems that it takes the brain this long to assimilate all that it needs to know to achieve true mastery.pp 196-197.
For some reason, I find this totally inspiring. So mastery is possible... all I have to do is put in about 9,000 more hours.