I've been browsing the forum for a bit and thought some tools I've learned could be helpful.
I've found listening to audio like podcasts, nature documentaries, YouTube history lessons, Audible shorter stories, etc. has been one of my most effective tools in falling asleep. This is especially true when I'm spinning on something from work I can't set aside.
The trick seems to be to find something that's interesting, but not so interesting that I have to listen. Just enough to distract me from whatever is stressing me. It may be genetic, my parents used to listen to talk radio at night and fall asleep to that.
Recently I've been testing an app that I've found does this particularly well, CalmAlma. It's in private beta and I know the developers. It generates content on the fly based on listening (sort of like Pandora). This has been great for me because the other podcasts and documentaries I've used would get repetitive and stop working.
They're looking for testers and you can sign up at Calmalma.com if you're interested. It's free.
Hopefully people find that helpful. I'd also be interested if others have found audio to be helpful, or any other similar tools. For me, this has been very helpful.