Also, don’t fall into the trap of productivity porn—chasing productivity for its own sake isn’t helpful. Many people spend too much time thinking about how to perfectly optimize their system, and not nearly enough asking if they’re working on the right problems.

A busy calendar and a busy mind will destroy your ability to do great things in this world. If you want to do great things—whether you’re a musician or entrepreneur or investor—you need free time and a free mind.