You can't go by me, my oldest didn't sleep through the night until after he was 2.
I tried letting him cry it out one night, and someone in a neighboring building called the police on me (true story).
After that I gave up and we did the co-sleeping routine.
So I think you can either give in and rock your baby until s/he falls asleep, put your baby in the crib and try to ignore the crying or give up and co-sleep.
Whatever you can live with.
P.S. Here's a web site which has a question & answer Forum. You may find something here: www.breastfeeding.com. (It's not only about breastfeeding, it covers all kinds of child rearing topics.)
