We did the a modified method of Babywise with both our kids, while our first was sleeping through the night at 4 months old, our second took a bit longer to take to not waking up once or twice a night until he was 8 months old, but I think a lot of that was that he was sleeping in the room with us until he was 8 months old. (scienceofmom.com)
I'm expecting my second and need guidance (we did babywise with baby # 1). (babywisemom.com)
I DID use Babywise with my oldest daughter, and modified it with my second daughter. (ezzo.info)