Try putting him down much earlier -- maybe 6:00 or 6:30. Also, how is he napping? A sleepy baby has a harder time sleeping (sounds strange but has to do with adrenaline). The book "Healthy Sleep Habits, Happy Baby" has lots of good information and advice. The doc who wrote it runs (ran?) the sleep clinic at the U if Chicago Medical Center. He is def a CIO advocate, more so than I could handle, but I still found a ton of useful info and advice. He does offer ideas for parents who don't want to be as hardcore as he about CIO. Also, the book is not simply about CIO -- not even close. There is a wealth of info in that book!