Evil - with DD1 we were very lucky, and hope to be the same this time round. The theory : We just very gently, taking baby steps, tried to reinforce the difference between day and night. Night time feeds were done with a tiny night lighht, no talking or stimulation. During the day feeds were made into awake times with songs and noise and trips to the window.
When DD1 woke up during the night she would wait for her feed a little longer each time (I'm talking minutes, not hours, and in my arms, not being left to cry) and gradually the night time waking became a regular, short feed every three, four, then five hours, and straight back to sleep afterwards.
It took ten weeks to have her sleeping regularly through six hours at night, and I considered her to be sleeping through when she did six nights out of seven with a six or seven hour stretch of sleep.
I have to say though agan we were lucky, and I can only hope this time round is as trouble free. I'm not going to start trying to get her to adapt though until she is a couple of weeks old and seems to be putting weight on, jaundice gone etc. I'm mix feeding, like I did last time and since Tuesday expressed into bottles for the breastmilk feeds. It worked for me last time (until I had to stop breastfeeding completely for other reasons) and paeds advised it anyway this time round.
I'll let you know if what worked last time works this time over the next few months.... Worth trying making night feeds into a non event anyway as a start :)