Romans 7:19

For I do not do the good I want, but the evil I do not want is what I do.

I know I shouldn't play when I'm exhausted. So what do I do?
I play when I'm exhausted.

I know I should work out every day, and especially on days when I'm playing. So what do I do?
I don't go to the gym and sit around while my legs atrophy.

Once the minimum intellectual requirements are met, the fundamental key to success in this game is pretty simple: self-discipline. That comprises physical maintenance, emotional equanimity, and mental toughness.

I have a ways to go.