What matters is not experience per se but “effortful study,” which entails continually tackling challenges that lie just beyond one’s competence. That is why it is possible for enthusiasts to spend tens of thousands of hours playing chess or golf or a musical instrument without ever advancing beyond the amateur level and why a properly trained student can overtake them in a relatively short time. It is interesting to note that time spent playing chess, even in tournaments, appears to contribute less than such study to a player’s progress; the main training value of such games is to point up weaknesses for future study.
Contrary to what you might believe, merely doing your job every day doesn’t qualify as real practice. Going to meetings isn’t practicing your people skills, and replying to mail isn’t practicing your typing. You have to set aside some time once in a while and do focused practice in order to get better at something.
I know a lot of great engineers — that’s one of the best perks of working at Amazon — and if you watch them closely, you’ll see that they practice constantly. As good as they are, they still practice. They have all sorts of ways of doing it, and this essay will cover a few of them.
The great engineers I know are as good as they are because they practice all the time. People in great physical shape only get that way by working out regularly, and they need to keep it up, or they get out of shape. The same goes for programming and engineering.