Earlier quoted context omitted.
Shutting off your phone and lights early is especially smart. It lets your mind and body transition smoothly into rest mode
I think it makes the biggest difference out of my habits. I kind of picked up on it when I realized that I never struggled to sleep when I went camping out in the woods. My body would instantly fall into sleepiness when it got dark out because I had no artificial light keeping me up as well as no easy access entertainment like TV
In these conditions, your body just knows when to shut down and recharge