ASMR videos (just listen with closed eyes, don't actually watch them), I was surprised how well they work sometimes, if I find the right sounds. (I like ear cleaning, head massage, rain drops, wood tapping, some kind of crinkle sounds but not others, etc etc, I hate it when anyone talks!)
Diaphragm breathing and counting breaths (either 1-100 or 1-10 and starting over)
I don't take any sleeping medication, any medication I've tried didn't give me restful sleep, it gives me blackout, and with blackout I'm physically out for x hours, but afterwards I don't feel rested, it's an unnatural thing to just be 'turned off and then rebooted'. There are no dreams, no feeling of refreshment or regeneration afterwards. I've had insomnia since I was little, I remember so many nights I couldn't sleep, I cried, I was hyperactive, my mother was crying to try to get me to sleep, or she was screaming at me, or she physically pushed me down on the bed and told me to bloody fucking sleep now, she turned the lights off and left me lying in the dark and said the monsters will get me in the dark if I'm not quiet, anything so she had peace. So I tried a lot of medication for sleeping for a long time. Nothing worked. But I've not been taking medication for at least 10 years now and I'm getting better, most nights I can deal with just breathing meditation, some nights if it doesn't work I take ASMR videos in addition.
Bad nights are maybe 1 in 10 nights alone, 1 in 100 nights with my partner holding me.