Insomnia

I have a very hard time sleeping recently...
I'm always very tired, but when I go to bed I can't sleep at all. So I just stare into the darkness at night and make up stories until the sun starts to come up, and then somehow I fall asleep, then I wake up a few hours later to go to work

Anyone have a suggestion of how to fall sleep? And no, that certain "something" doesn't really work anymore, I feel very well awake just a few minutes after that

On the other hand, the stories that I make up at night are quite interesting, it's as if my mine is trying to write a book, but it's really a bunch of unrelated funny stories.
People from a certain non-existent place have already heard a few of the stories