I was always a great sleeper. Any time, anywhere, any position. No more. Now, if I'm lucky I get 3 to 4 hours uninterrupted sleep. If I'm really lucky, I can go back to sleep for another 2 or 3 hours but that is the exception, not the rule. I tried ambien which worked well for a while but my body apparently acclimated and I was back down to about 5 hours a night and worse, I couldn't sleep a wink without it.

Exercising several hours before bed seems to help.