"The prescription must be that if there’s something you want to do a lot of and get good at—like write, or fix bugs—you should try to do it faster. That doesn’t mean be sloppy. But it does mean, push yourself to go faster than you think is healthy. That’s because the task will come to cost less in your mind; it’ll have a lower activation energy. So you’ll do it more. And as you do it more (as long as you’re doing it deliberately), you’ll get better. Eventually you’ll be both fast and good." Speed matters, via jsomers.net