Some good suggestions here already Buggs; I get those nights too. Sleepless all night really sucks. No reason it seems, not hurting, not worrying, but I think sometimes it happens if I have a lot of people or activity around me later evening. Sometimes it seems to be the food I eat a little late...not that it hurts my stomach or anything.
I usually get up and use the computer or read. I do have a reliable sleeping med; to be used not very often; but the trouble with it, one has to take it about an hour before bedtime...and you've got to have at least 8-9 hours of sleep time. I can use
an alieve or tylenol tablet and it often helps.