Good advices on how to sleep well. They remind me what Seneca wrote somewhere in his Moral Letters: "The fact that the body is lyind down is no reason for supposing that the mind is at peace" and if mind is restless, the sleep is poor.

I always have to fall asleep in the complete dark.

Tis good advice - long as your not narcoleptic! when I do manage to 'sleep' I don't get any further than REM stage - not very restful at all, however every couple of years or so , when the fatigue is just totally overpowering I have been known to sleep for 3/4 days solid - then I feel I could take on the world!
Am little bit envious of people who can sleep properly, but when they choose not to get enough and then complain! - well! I do get a little cross - so everyone (if you can) Get Some Sleep!

interesting, thanks