My son is 15 mnths and we just started this and it only lasted for 3 days!
After we take a bath, we play, have a snack. At 8, I tell him let's go upstairs, read books and go night night. Then me and my S/O pick out a book to read to him, get all cozy on the couch and read the 2 books. Then we lay him in his crib, turn on his mobile, tuck him in, say our goodnights and leave.
We listen to him cry, and if the cry is really bad, then we go up and lay him back down, and checked on him every 5 minutes. By the third night, he was done crying by the time we hit the bottom step.
It's different for every child, but having a bed time is great, and a routine is nice.
Good luck to you!
at 10:42 PM on Mar. 28, 2011