Funny how so many of our little "unusual" habits are all similar.
I never could have slept without a tv on a few yrs back (funnily my non-emet sister does this too - I think we inherited it from my dad who has his on all night) but my fiance would get so frustrated - no matter how soft it is, it wakes him. At first not having it on would keep me up all night, but I've slowly gotten used to it and now have no problems going to sleep without it. I still can't go to bed too early though - I end up waking during the night and that always panics me - so I'm another after-midnight sleeper.
And yes, constantly having a bottle of water and a particular brand of chewing gum. I'm in the process of slowly weaning myself off the chewing habit though!