I know it will be tough as we have just managed to crack the controlled crying with my 11 month old. Boy was it hard!
A really good website I used was:
http://www.supernanny.co.uk/Advice/-/Parenting -Skills/-/Routine-and-Teamwork/Controlled-Cryi ng.aspx
The forum linked to the controlled crying is helpful too.
The basics are putting your son down AWAKE, but tired (wait for a yawn or that long lost gaze), settle them into the cot and then leave the room. If he cries, go back after two minutes and settle him again WITHOUT picking him up (try rubbing his back or gently patting him). If he is still crying double the time to four minutes and repeat, then double again to eight minutes and so on. Try not to spend longer than one minute calming him down.
My daughter would hold onto the cot bars and scream at me. I rubbed her back through the bars.
Please be really strong. It will not be easy.
As a light at the end of the tunnel, the first night I had 40 minutes of uninterrupted screaming before my daughter slept. She woke once in the night and I had a further 20 minutes of screaming. She then woke again at 8.40am!
The second night took 20 minutes at bedtime. She woke twice in the night and settled herself back to sleep without me! Both times she cried for less than two minutes.
We have now done six nights of controlled crying and now the only tears are the initial ones at bedtime. She now sleeps all night long. BLISS!!!
All the very best of luck x