Neither of mine ever slept through before they were 1 (DD is 1 in a couple of weeks, still hoping!). We did lots of cuddling to sleep, shush-pat, that sort of thing.
With DS, once he'd dropped night feeds (around 9mo I think), we went through a looooooong period of having to stand over the cot with one hand on his back or stomach, followed by ninja-style creeping out of the room, dodging the squeaky floorboards and hoping he wouldn't hear us breathing 
With DD, we've basically tried everything other than prolonged crying. Co-sleeping for the first nine months of her life, feeding on demand, anything to gain a few more precious moments of rest! Pick up/put down worked well for night weaning - hard on the back for a few nights, but she did eventually accept no milk and being put back in her cot, and now she quite likes having her own space. We also started offering water when she woke at 9pm, 10pm, 10.30pm, 11pm. She was very emphatically Not Happy about this, but it only lasted a few nights. Unfortunately, being as contrary as she is, she now wakes for a drink of water at 3am instead.