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Learning to Play an Instrument
Time Required: Unless you’re aiming for Carnegie Hall, you’ll benefit from about an hour of practice a day; some musicians believe even the most diligent start losing focus by hour two.

Where to Find It: The average mobile YouTube session—i.e., you look up one thing, then sink into an endless stream of napping baby panda clips—is more than an hour. That’s primo strumming or drumming time.