I've had various sleep problems throughout my life.
For a while, it was not being able to turn off the old brain-box. Laying there thinking. That was part of depression, and once I got that treated (Wellbutrin), I was able to relax and go to sleep. For others it's not depression, it's anxiety.
If I do wake up at night now, I don't even try to go to sleep. Doctors tell you if you can't nod off again, quit trying. And they're right. I'll usually do something like hit the internet for an hour or so, then lay down in front of the TV. I watch a DVD of a show I've already seen -- I don't want to get caught in that trap where I want to stay awake to find out how the show ends.
And if that's not enough, I'll try one of two things. One is relaxation technique. I breathe in really slow, hold it, breathe out really slow. Repeat as needed. First time I heard this, I thought it was complete b*******, but I swear, it helps. My alternative is a glass of wine, which works well too.
The thirst thing may not be the contradiction it seems. If you sleep with your mouth open your mouth will dry out, no matter how much water you drink. The tendency is to think, "Well, I don't do
that," but I thought that until the wife complained about my snoring and I put a camcorder on me one night, and sonofagun, I
do snore.
