* Fresh air and sunlight during the day
* Strenuous exercise at least every other day, no less than an hour before bed time though.
* Limited screen time especially for an hour before bed.
* A cold bedroom. Leaving my feet out from the duvet seems to help me stay cool and sleep deeply. Might not be for everyone though
* a very dark bedroom, bin the blinds and get blackout curtains.
* No booze, no caffeine after about 3pm.
* Don't head a big dinner right before bed
* Don't drink a load of water for a few hours before bed either, or you'll wake up to piss.
I think that's all pretty standard stuff.