Practice makes perfect, or so the saying goes. But what are you actually accomplishing from repetitive practice? Hours of drills are necessary to achieve mastery of any skill, yet the hours of practice do not necessarily lead to proficiency.
According to Malcolm Gladwell, most masters of their craft have put in roughly 10000 hours of practice prior to mastery. However, those 10000 hours can't be mindless, rote repetition. What separates the amateur from the expert is the thousands of hours of mindful training--it's 10000 hours of focused attention to perfect practice that develops highly refined skill.