Lemmings who can fall asleep within minutes of their head hitting the pillow, what's your secret?

Are you just always tired? Do you have some kind of bedtime ritual? Have you had issues sleeping in the past and how did you handle that?

In my head i’m making a “movie”. I make the same “movie” pretty much for 30 years now. I didn’t got really far at all, i always start from the beginning and usually fall asleep bevore i reach the end of my already existing script. During the day or before i go to bed, i sometimes think about things that could happen in the “movie” later on, but i usually never make it that far. I often end up tweaking the beginning over and over until i fall asleep. It hardly ever takes me longer than 5 - 20min to fall asleep.