I was using nursing to get my four month old to sleep and since we've started the baby whisperer stuff I've changed our evening routine and its been good so far. If its bath night we do bath first and then the rest is the same. 5 min or so in crib with music, calm down thingy, top up feed with all the lights on and if he starts to nod off i switch sides, Story with dimmer lights, then swaddle and cuddle with just the night light for 5 min and then it's off to bed. We're only 4 days into the sleep training but it only took 5 min last night and tonight to get him to sleep.
Hope this helps