I think Jay Gordon’s advice about night weaning is a great place to start. I referred to it often when night weaning my son, however his weaning plan didn’t exactly suit our situation, so I adapted it to suit us better.
Keeping in mind my little boy was 3 and a normal night for him was being fed to sleep around 7pm in his own bed, then waking around midnight and coming into our bed to feed for the remainder of the night. Some nights he would feed continuously from midnight until 6am. When he started the day – it was very much like a “dummy” for him. He also had a single bed, so I was able to fit into his bed and sleep with him.
The main motivation for me weaning him and hopefully getting him to sleep through the night without me was I was pregnant with our second baby at the time. I really wanted him well on his way to be weaned night and day, and sleeping through the night, BEFORE the new baby arrived.