The first 20 hours -- how to learn anything只需20小时，你就可以学会任何事！-Josh Kaufman

Josh Kaufman's TEDx talk argues that you can reach practical competence in almost any skill with about 20 hours of focused practice, rather than the 10,000 hours often quoted. He describes how becoming a parent led him to rethink how adults learn, and lays out a short method for rapid skill acquisition.

Why HN likes it: HN uses it as the standard counterpoint to the 10,000-hour rule and as an encouraging recipe for starting new skills.

“the threshold for acquiring new skills for personal or professional use is somewhere around 20 hours.”