loveee love this genre called "slowcore", it's a genre of indie rock that sounds really quiet and melancholic and just overall feels like lullaby, if that's what you're into :] never fails w me, i love feeling like i'm being sung to sleep lol, also focusing on all the sounds and lyrics can help with falling asleep for me!
bands like red house painters, duster, galaxie 500, eiafuawn, tram... i have many
also ambient music! i love the band grouper, there's this song "litte gray cat" and i think it did its job even when i wasn't feeling tired at all haha
Buut if you don't want music, you can watch interesting livestreams on twitch or letsplays, a true crime documentary(if not disturbing while trying to sleep haha), any other documentary or commentary video, whatever's long enough !