Deep practice is built on a paradox: struggling in certain targeted ways-operating at the edges of your ability, where you make mistakes-makes you smarter. Or to put it in a slightly different way, experiences where you're forced to slow down, make errors, and correct them-as you would if you were walking up an ice-covered hill, slipping and stumbling as you go-end up making you swift and graceful without your realizing it.

You have to be willing to stop and fix. Deep practice requires a willingness to do what many of us find uncomfortable: to admit to our errors, and focus on them.

To sum up: it's time to rewrite the maxim that practice makes perfect. The truth is, practice makes myelin, and myelin makes perfect.

The solution is to ignore the bad habit and put your energy toward building a new habit that will override the old one.

There is no substitute for attentive repetition.

The staggering babies embody the deepest truth about deep practice: to get good, it's helpful to be willing, or even enthusiastic, about being bad. Baby steps are the royal road to skill.

Skills are really just circuits in your brain