The "8am to 2pm deep work then calls late" switch is exactly what worked for me here too. Once I stopped fighting the closing times and front-loaded my hard stuff, my evenings opened up and I stopped feeling like I was chasing the clock.

Stacking works for everything, been doing it with coffee and reading.

Man, come on. Your barber told you to stop washing your hair so much and you think that's some big secret? That's like saying your dentist told you to floss and it "changed your life." Flakes gone in 8 days could also just be that your scalp adjusted, or the weather changed, or a hundred other things. One guy trying one thing one time is not proof of anything. I'm not saying washing less is bad, but acting like Marcus unlocked the secrets of the universe because he told you to rinse instead of shampoo is a stretch.