This comes from trauma therapy, specifically Polyvagal Theory. Patients have their life story and often think of it as the reason for their current problems, when in reality a huge portion of that might be their body, ie the state of their nervous system, informing a story they tell themselves, making mental illness an infinite loop.
So for self management: Get into a happy state and you'll be productive.
Body:
-sleep
-food
-water
-sun
-posture
-exercise
Mind:
-well basically "Learned Optimism" by Martin Seligman
My main point being: How we learn what hard work is (the Hollywood version), and how work needs to feel (Stress! Panic! No sleep! Hustle! Endless To Do lists!) is very wrong and gives you anxiety => puts your body into a bad state.
And if you are in the bad state and unproductive, people usually resort to "I'm not doing this right, I need to put me into the bad state harder!". See the endless tools you listed. The problem lies elsewhere.