I dealt with this with my daughter & now my son. With my daughter we tried everything - cereal before bed, etc. . . . The cry-it-out method (which I HATE) worked the best. I was told by 6 months they are eating in the middle of the night out of habit. This totally made sense to me. So at 10 months, she cried for an hour the first night, then 15 mins, then 5 and was sleeping thru the night about 5 nights a wk. Vacations always set her back for more than a month. My son is 6 months old & was sleeping thru the night at 4 months, but then we had to go on vacation & he has only slept thru twice. He would sleep about 3-4 hrs, then wake every 1-2 hrs, but would only suckle back to sleep. We started the cry-it-out method at his first waking. I would then go to him after that & he has gotten MUCH better. He now sleeps approx. 6 hrs before waking, then eats & goes down for another 4. In the middle of the night I let him cry at least 5 minutes before going to him, cuz a lot of times, he just goes back to sleep. Just make sure you stick with whatever you try for longer than a couple of days before scraping it & trying something different. I know a LOT of people discourage the cry-it-out method & I would normally be one of them, but that was all that worked for my family! Good Luck!