I would frame the same idea in a different way: the scarcest currency is thought. Willpower is finite. There are a very small number of things you can spend ef

I would frame the same idea in a different way: the scarcest currency is thought. Willpower is finite. There are a very small number of things you can spend effective mental energy on-you can't work at optimal intelligence 12 hours a day (or even 8 hours a day). Furthermore, I've noticed this trend where spending twice the amount of effective, focused work on X usually results in more than twice the benefits. This means that you have to pick what even enters your attention very carefully. So ask yourself: what do I spend most of my time thinking about? And what should I be spending my precious thought on?