Yes, logging off is a must. Try reading a magazine article rather than a book, much lighter on the brain and then as you put the magazine down, think about a journey or walk you've taken. Name the streets as you go or name the towns you drove through. If that doesn't send you to sleep, then pick a letter and name as many, towns (or birds, animals, rock groups, designer labels, sports) you can beginning with that letter and keep a count of them. I'm usually asleep by now or if not at least planning a holiday!
Good night all, sleep well.