I mostly stopped using caffeine and alcohol. I find that while I used to stay up till 2am left to my own devices, I now naturally fall asleep very early and wak

I mostly stopped using caffeine and alcohol. I find that while I used to stay up till 2am left to my own devices, I now naturally fall asleep very early and wake up very early with quite a bit of energy. That was just my experience though, who knows how much it applies to others. Something I do occasionally reflect on is that I started drinking a few caffeinated beverages a day when I was maybe 11 or 12. And then through my teen years and beyond I identified as a night owl. You wonder how much of that was literally just using a stimulant. It's funny how we generally don't think of caffeine as a drug.