Coming from a mom who still has a 5 yr old girl kicking me in the ribs and elbowing her dad in the nose in bed every night... the earlier you can figure this out the better. ;-) She was our first. I think where I went wrong was nurse her in bed when she was a baby, then I'd fall asleep and end up keeping her with me all night. I weaned her at 7 months and we started trying to get her to sleep in her own bed. She'd wake up SEVERAL times a night. She did not respond to the cry it out method... or any other method. She could cry for hours... she has the will of 10 men. We tried and tried and tried, but we finally gave up after about a year and just let her sleep with us. We'd make another effort every few months... to no avail.
When our son came along, (now 2) I made a point to nurse him and put him back to bed. He slept in a cradle next to me for the first 4 months to make this a little easier on me. I read in a book that as long as you get them in their own bed at night by 4 months, it will be an easier transition. As a result, he has always slept in his own crib and now has been in a toddler bed for a month or so and doing great.
Our son is a text book baby that those baby psychology books are written about. He rarely fussed about going down in his own bed, and if he did, he cried for 5 minutes, MAX. Now he tells us when he's tired and wants to go to bed at night. All kids are different, so just find what works best for your and their personalities.
ALso recomend trying to get her to take a sippy of water to bed in lieu of the bottle. Worked for my girl.
GOOD LUCK!