10,000 Hours of Dance
You've probably heard, through some vague unidentified grapevine, that it takes 10,000 hours to become a "master" at a particular skill. It was shared widely in one of Malcolm Gladwell's books and generally poorly interpreted, with individuals thinking that if you can just tally up a bunch of hours, you'll naturally become good at something.
This is misdirected at best and a dangerous time sink at worst. (Trust me on this: I have poured thousands upon thousands of hours into League of Legends and still have not peaked anywhere higher than Gold.)
However, it is not entirely without merit. Although...