Essentialism

The way of the Essentialist means living by design, not by default.
Instead of making choices reactively, the Essentialist deliberately distinguishes the vital few from the trivial many, eliminates the nonessentials, and then removes obstacles so the essential things have clear, smooth passage.

In other words, Essentialism is a disciplined, systematic approach for determining where our highest point of contribution lies, then making execution of those things almost effortless.

Only once you give yourself permission to stop trying to do it all, to stop saying yes to everyone, can you make your highest contribution towards the things that really matter.

Greg McKeown

Still one of my favourite books and one I recommend reading every year.