I think I'd like to say to my son when he gets older, "You have to have at least one skill you're actively developing that takes several years to master. It can be piano or chess or language or baseball or StarCraft or juggling, but it has to be something that takes time to master, and you have to spend at least a few hours every week in deliberate practice."

I also plan on modeling that behavior by having skills I continue to develop for the rest of my life.