Prolanolol, side effect from the aim at reducing migraines. You can try Physiological sigh, they're great at completing the stress cycle. Detoxing from light sources for a couple of hours before sleep. No screens, dim all lights. Theres one where you tense every muscle, hold and then relax and imagine its super super relaxed, one at a time, all the way from feet to head.

Personally I have to listen to a show that's just interesting enough to keep my attention and not too interesting that it'll keep me awake to see what happens. (And without a super boppy intro outro, or it'll wake me back up.) I can sit there for hours and not sleep, trying without a show, turn a show on and I'm out in less than 5 minutes. It's insane.