the energy drink is aBAD idea, take this from a bloke who drinks 3 cans of relentless per day MIN, i find without it now i cant work as efficient and the director has ALSO noticed that he also brings me relentless when he goes for lunch
the reason you cant sleep is STRESS, your thinking about something but its stressing you out
its not santa syndrome as its every night so i would say its stress, i was like that for ages due to the cossie, my personal plate and other general stuff like having a child but not being secure blah blah
i still have issues sleeping but its caused by using a fucking comouter each night till i pass out
seriously either have sex, that will knock you out or read a book then have a wank if your single ( dont think the missus would feel good about you reading then gettign in the mood
also turn the radio on low with the static white noise, that will help you not to be disturbed
seriously though it sounds like theres some form of stress you aint realised though
took me a while but i discovered it in the end
oh and NEVER drink a can of relentless at 1am if you aint got any milk in and fancy a drink in the night
i done that ONCE,,, was up till 530am when i fell a sleep for a hour and went to work
oh sunbeds also promote sleep, the missus when she cant sleep turns it on for a hour and shes off in 5 mins