I'm on the other side of it. I'm horrible at this. I can confirm that being horrible at this is putting a big limiter on my potential output. IMO this is more

I'm on the other side of it. I'm horrible at this. I can confirm that being horrible at this is putting a big limiter on my potential output. IMO this is more important than exercise. I find exercise very important as well, and easier to implement (even when sleep deprived), but resting well simply gives more bang for your buck.