tested lots of different techniques during that time and the only one that I think had some effect was doing cardio that was intense enough to leave me physically exhausted.

What works ish for me semi consistently that isn’t drugs when having severe trouble, sitting in front of a personal heater til I overheat and that makes it easy for me to fall asleep, but it only works in the winter and i have to be naked so sweat evaporates.

Tried once, no obvious effect