Tools of Titans: The Tactics, Routines, and Habits of Billionaires, Icons, and World-Class Performers

by Timothy Ferriss

if you don’t do something well, don’t do it unless you want to spend the time to improve it. Still, to this day, I see a lot of guys do stuff in the ring and think, ‘He doesn’t do that well, but he does it all the time.’ You shouldn’t do that.”