We've been starting to give Wylie a formula bottle at night after I nurse him (he drinks an additional 4 ounces) and this has really helped him sleep. He now only wakes up once and goes back to sleep right after I nurse him. I hate having to buy formula because it's ridiculously expensive, but I'll do anything to get a little more sleep at night.
Plus this kid loves his bottle, he starts bouncing up and down when he sees it! I think it has also made me give up his binkie (which I'm fine with, he does still have it at naps).