My DD is almost 11 months. She occaisionally slept a number of hours straight over the first 9 months of her life, but it was rare. For a long time she was up every 2-4 hours. I did a couple things that helped:
I believe I was keeping her too hot. She seems like a hot sleeper and doesn't require heavy PJs.
I think she needs more to eat than I thought. She has a fast metabolism or something. She is often too busy to bother with food, and I would just let her skip it a lot, and then she would want to nurse all night. I make a good effort to offer either nursing, a bottle, or solids every 2 hours now. We do lots of snacks during the day (cubes of cheese and bread are a favorite - she stands at the coffee table and eats them. For some reason now that she is mobile, standing and eating is really fun.) We do a puree twice a day so I know some is going down. And lots of opportunities for finger foods.
I got her to fall asleep on her own when going to bed, which immediately transferred to being able to put herslef back to sleep when she was half awake during the night between REM stages or whatever. Before this she had to nurse to go to sleep, and it just wasn't working for me anymore. To do this, we were often standing at the crib or lying in our bed with her. Never CIO, but we would lay her down, when she fussed we came back and laid her back down, rubbed her back, turned the music box back on etc. Just repeated a lot. After a few nights she got the hang of it. First she would go to sleep with us standing there touching her, then sitting in a chair in the room. Now we basically do her bedtime routine, kiss her, and put her down and she will play or look at her books and then pass out whenever she is ready while we enjoy our evenings.
We often do a bottle during the night. She not only takes more milk from it (therefore able to go longer between feedings) but she also just got the idea that night time is not for nursing. Dad often gives the bottle. I do still nurse her some during the night, especially when I am too lazy to fix the bottle or don't have time to pump, but for the most part that is the routine she has come to know.
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