Length of time doing something doesn't imply mastery. It can contribute to mastery, but only if you're always pushing your skill to the next level I think. Fo

Length of time doing something doesn't imply mastery. It can contribute to mastery, but only if you're always pushing your skill to the next level I think. For example: I know people who have been skateboarding for decades and are just barely OK at it. How you practice matters.