"Because in reality your time is finite, doing anything requires sacrifice—the sacrifice of all the other things you could have been doing with that stretch of time. If you never stop to ask yourself if the sacrifice is worth it, your days will automatically begin to fill not just with more things, but with more trivial or tedious things. One can waste years this way, systematically postponing precisely the things one cares about the most."

- Oliver Burkeman, Four Thousand Weeks