I'll try that. What I do, if I'm thinking too much, is concentrate on how comfortable the bed is, or, for example how my left elbow feels. Also deep breathing, and muscle relaxation helps.
For the first half of this year, I was sleeping great. I'd fall asleep right away, and not wake up until morning, feeling refreshed.
Then a month or two ago I started getting into a pattern of waking up around 4 AM, and struggling to get back to sleep. The full pattern was: feel drowsy around 8 PM, barely staying awake while watching TV, go to bed at 9:30, wake up once or twice in the night, and then waken at 4:30.
I attacked it by eliminating all naps, and having plenty of light on until bed time. If I feel drowsy in the evening, I get up and walk around. I very quickly got back to the desired pattern.
Check out these:
Sleep Disorders - Circadian Rhythms and Light Therapy
Amazon.com: The Insomnia Answer: A Personalized Program for Identifying and Overcoming the Three Types ofInsomnia (9780399532979): Paul Glovinsky, Art Spielman: Books