H.W.
We were in your same boat, and at exactly 8 months of age, we knew our family was ready for a change. My husband and I were exhausted, and it was becoming evident that our baby girl was ready for some gentle sleep training. I researched heavily and found an online program we all liked and benefited from greatly: Dana Obleman's Sleep Sense. Download it now, and start tonight! For our daughter, who was a NIGHTMARE "sleeper," it worked the first night (again, she was soooo ready, and we could tell the timing was right). It's not rocket science; the program is actually quite simple and logical, but the key is consistency. Consistency is the fairest approach for your child, and it works. Best of luck to you!
BTW, to answer your questions about feeding, if you daughter is a normal, healthy sized baby, she does not need milk during the night anymore. It's hard b/c she's probably asking for it, but offer her water in a bottle. In no time, she will not feel the need to habitually (or sporadically) wake int he night for milk....IF she knows how to get herself to sleep on her own---babies go into light sleep mode every hour, so if their tummy is used to milk, they will wake up for it. If milk is the only way she knows to get back to sleep, she will insist upon it, even though her body doesn't physically need it. This sleep program will teach you how to teach your baby to put herself back to sleep on her own w/o needing you to intervene with milk or anything. :)