Basically it boils down to sleep hygiene, self discipline and persistence. Don't expect miracles though, I still have the occasional dodgy night, I still occasionally take a anti hystermine to help me sleep but its a hell of a lot better than it was. I actually enjoy switching off all my screens off at around 9pm and then just relaxing with a book or a magazine and a hot cup of cocoa.
http://www.sashastephens.com/the-effortless-sleep-method/
Basically it boils down to sleep hygiene, self discipline and persistence. Don't expect miracles though, I still have the occasional dodgy night, I still occasionally take a anti hystermine to help me sleep but its a hell of a lot better than it was. I actually enjoy switching off all my screens off at around 9pm and then just relaxing with a book or a magazine and a hot cup of cocoa.