Gosh, if I had any more suggestions, I'd use them myself. Our son (25 mos) will actually go to sleep in his own bed, but ALWAYS seems to find his way stealthily back to ours. We did have him sleeping in his own bed almost all night a few months ago, then he got very sick with an upper respiratory infection and needed to be elevated while sleeping and I didn't like the way he sounded when he was breathing. I couldn't elevate the base of his bed high enough, safely enough and he refused to sleep in his carseat, so he wound up coming to bed with us and our zillion pillows. We made sure to shower with him (the steam helped him open up a bit) before going to bed and used children's vapor rub... there's a cherry kind... on him and regular vicks on one or both of us so he was surrounded with vapors. I didn't get any sleep because I wanted to keep an eye on him to make sure he stayed on top of the pillows or one of our chests. He's better now, but still climbs in bed with us nightly.
I actually tried to stay up all night recently because I kept making sure I put him back in his own bed whenever he got into ours... yeah right! I'm not doing that again. Our situation is complicated by the fact that his room is in our room. We have a room devider up between our space and his and he has his toddler bed, his own dresser and toys set up with a play area, but we don't have enough rooms in the house for him to have his own room and there's not enough space in our boys' room for his bed to fit too.
He is my fourth child and the rest of them do sleep in their own beds except for the occasional living room camp out. I know that there is an end to the every night routine, but I just don't know how long it will take. All I can say is stick with it. I know the every night thing will end for you too. My friend has a pre-teen who still finds her way into their bed when she's having a rough night. My oldest son (13) sometimes crawls in bed with me to cuddle when there's something on his mind and he can't sleep late at night and my middle son (9) asks for me to lay down with him until he falls asleep sometimes. He's afraid of the dark and won't even walk up the stairs unless there is someone else upstairs AND there are lots of lights on. (Do you have a night light in your daughter's room?) My daughter (12) seems to be the only one who stays by herself all night, but sometimes I'll wake up to her staring at me... it's a bit unnerving, but she always asks me if I was sleeping or tell me she's sorry she woke me. This is usually the window of opportunity to find out what's on her mind. They also do this whenever they are not feeling well.
I guess my point is that it will never end until they grow up and move away... then you'll wake to the occasional middle of the night phone call when they can't sleep or there is something going on in their lives. I am trying to see it as a blessing that my kids know that I'm here for them day and night... I miss my sleep, though. I REALLY miss my sleep. I'm hoping that this summer I can get my DS to sleep in his own bed most of the time before I have to go back to work in August/September because I'll be useless to an employer and I won't be very friendly, I'm afraid, if he doesn't... LOL. I keep trying to remember "This too shall pass." It seems to be my motto these days.
Good luck. You are not alone!!