I used to BF lying down in bed and when he was asleep I'd carefully move away. Sometimes I'd try to move him into his bassinette, other times I'd just make sure he was in the middle of our Queen sized bed and feel safe enough to leave the room. Actually we still do this but these days he doesn't always need to be fed to sleep. Some people might say that doing this "creates a rod for your back" but don't listen to them. Over the course of your babies life you will find that many different strategies help to settle. This is just a sure-fire method for the early days (in my experience) and when you are exhausted you do what works!