I know, which is why I stated some people do have medical issues that stop them from sleeping.
Shutting your brain down - Try mindfulness meditation or watching ASMR videos. These videos are excellent because they are relaxing and concentrate your mind on something which stops the endless spree of thoughts.
You cannot control your thoughts, but you can control your activate analysing of them.
Shrinks have had me try all sorts mate, meditation, acupuncture, strict routine, medication(only heavy sedatives work but don't want that sort of life), physical activity, yoga, reading. Nowt works. I function ok though, problem is for me is that days are too short. I seem to require about 4 hours for every 48-72 hour periods.


