I am with Julz and Reluctant mum on this one.. Sleep training, sleep training, sleep training.. no bottles, no water, no rocking .. ZERO!
I am also a Gestapo member with Reluctant mum, but I can guarentee you sleep training works, but if you cant stick with it, then you actually just confuse the child, and make things 10 times worse.
So, if you want to do it, make sure you are ready for it, because its VERY difficult not to just go into a crying baby's room and not offer him/her a bottle/comfort..!!
My LB is sick with the adeno virus at the moment, and he still sleep through the night, or should I rather say -- I can hear he wakes up, but does not cry, then I am getting all worried as maybe his nose are totally blocked/cant breath/dirty nappy bla bla bla.. by the time I get there, he is sound asleep...
The main thing is to teach your child how to self sooth, and let me tell you, my LB did not have A CLUE about self soothing!!
I think sleep training saved my marriage and prevented me from ending up in a place with a green roof.....
Good luck! Hang in there!!

ps. I used dr Christopher Green's method of controlled crying...