L.L.
My little girl was like that. We implemented a 'special treat' program! When I put her and her brother to bed I say (and have said it for a while so she says it along with me) we are going to bed, and we need to stay in bed all night, no getting up until it's light outside or Mommy comes to get you in the morning, and if you stay in bed I'll give you a special treat in the morning! She gets soooo excited and darned if it didnt work. I either get piddly little things from the dollar store (barrettes or toy watch or something), or give her a small piece of candy, like a few M&M's. She looks forward to it in the morning. She still has moments when she wakes up crying, but she doesnt come into the bedroom every single night, three times a night for no reason.