Please Help!

How in the world do you get an incredibly stubborn, hard headed, two year old to sleep in her own bed through the night? Hadlee Anne hasn't slept through the night more than twice since we brought Jack home from the hospital nearly nine months ago. She's getting to be a bit of a drama queen and is rather manipulative (hm, not sure from where in her genetic makeup that may have arisen). Tonight we (being I) tried to get her to lay down and go to sleep on her own... for an hour we battled, played her aquarium, tickled her back and played with her hair, and when all was said and done and I got up to leave her while she was on the brink of sleep she got so upset that she threw up in her bed. Yuck. Suggestions would be fabulous for this stressed out, sleep deprived, exhausted mom. Thanks.