momo and armstroe:
It worked with me, but I'm not sure whether it was just pure luck...
For the first 100 days, my baby just refused to sleep if wasn't held. We would rock and cradle him until he fell asleep in our arms. But when we tried to put him in his crib, even HOURS after he had gone to sleep, he would just wake right up. One day, at 2 weeks old, he stayed awake for 6 hours during the day! He was breast-fed at that time. And he just loved nibbling on me. He actually didn't drink. He was too tired to suck anything out of me.
My baby was born with one tooth, so at 3 months old, we were recommended to give him some solid. Heinz baby cereal. He started to become more relaxed and sleep longer. It made us wonder whether he actually was just hungry and I didn't have enough milk for him. A week after the solids, I tried to put him down in his crib when he was very sleepy, but not yeat asleep. He cried for a few minutes the first night, but was too tired to fight or even open his eyes. We tried again and agian both at nights and at nap times. At 3 1/2 months old, he slept from 8 p.m. to 7 a.m.! I went in to nurse him once at about 10:30 p.m. Shortly after that, he just didn't want to get up at 10:30 any more. I felt very lucky.
Now at 13 months, my son sleeps straight from 7 to 7, and has been since 7 months old. Sometimes I hear him talking at nights, but we NEVER have to go in. He falls back asleep by himself. I believe that's it's okay to let babies cry once in a while. They have to learn to sooth themselves to sleep.
When you're nursing, it's hard to say no. I truly understand.