cio is not for everyone. You have to do what feels right for you. read some books on sleep I really liked the baby whisperer. It was a good book I did not read it untill a month or two ago so it was to late. Im going to put our next baby on this plan. Here is a website for it it might have info if not you can talk to other moms who do it.
http://www.babywhisperer.com/smf/index.php