I used to have insomnia. Still do, to a point.
I used to be awake for 70+ hrs at at time. It is very counter productive. I still only get about 5 hrs. of sleep per night, but… it works.
My trick:
I used to have your problem. My mind goes too fast when I am alone, in bed. I think about everything. So, I have dedicated the rest of my day to making me both mentally and physically exhausted. Get some structure to your life. My days when I was an insomniac I had no structure. My days would consist of me waking up, playing on the computer for a while… if I felt like it id hang out with friends, play some video games, go to class… play video games again… sometimes I’d do combinations. (play video games in class with friends)
Then I started getting some structure. I got a job I had to be at every morning at 8. That made me have to TRY to go to bed every day. It wasn’t enough. I’d get home, and pretty much do nothing the rest of the night.
Then I got an idea. What if I make myself so busy, I have no time to think?
Currently, my job sucks… but the plan still works. I do nothing at work… but I have to be here from 8 AM to 5 PM. Working on fixing that… but this job neither drains me physically or emotionally. So I have to step it up in the other facets of my life. Right after work, I go to the gym. When I go to the gym, I work out certain muscles until I physically have dificulties using them to do normal tasks. It probably isn’t the best way to work out according to scientific studies… but I get what I need from it. Also, do cardio. Nothing is more draining than cardio.
After the gym, I have to kill the energy my brain has left. You will have to find out what does that for you, but for me it is doing things with people.
Every Monday I meet some friends for dinner.
Every Wednesday I have a poker game I go to.
Soon, every Thursday I will have boxing lessons.
The days I don’t have something planned, I work weeks in advance to fill up. Because I know that if I don’t fill it up, I won’t get to sleep. I am usually gone from my house from 7 AM to 9 PM every day. I wind down by watching an hour of TV. I brush my teeth, I shave, then I go to bed. When I get to bed, 3 minutes after my head hits the pillow, I am out. Nightly routines are important. they condition you psychologically for your rest.
I hope this novel helps putting you to sleep.