li555, since he was young (only 4 months), we did a modified version of controlled crying (gina ford). so i would put him in his bed and leave the room . once he would start to cry, i would go into his room every 5-10 minutes to check up on him. after going in 3 times, i would lengthen the time to about 15-20 minutes. most books do not recommend picking the baby up, but i actually did for the 4 nights. i would go pick him up, comfort him a little and just put him straight down again (staying no longer than 1 minute in his room). after the first 4 nights, if he did cry, i would still go in and check up on him but i stopped picking him up. i only patted him on his back to comfort him and rubbed his head to calm him down. for my baby, he learned to put himself to sleep for naps really quickly (within 4 days). for the evenings, it took a little bit longer - two weeks for him to stop crying all together. luckily for us, he never cried that long or hard. his normal pattern would be that he would cry for about 10 minutes, then quiet down and then if he weren't asleep yet, start up again in another 10 minutes. the first couple of nights were definitely the hardest and everytime he cried, i just wanted to give up. but honestly, thinking back now, it really was worth it. now that he has learned how to fall asleep himself, he sleeps so much better and is much happier during his awake hours. these days, for the most part, he happily goes to sleep without any protesting. he takes 3 naps during the day and sleeps from 7-7 at night (with a dream feed at 10pm).