It's all in the routine. If you have a set of events that lead up to bedtime and those events don't waiver, she'll get the drift and end up sleeping on her own. Such as, bath, diaper change, getting the jammies on, etc. Make sure her room is cool and dark, but not too dark. Unless she's just really sensitive to light. I personally had to get up several times a night with my son until I bought a sound machine. Now when it's time for bed, I turn his machine on to the sound of rain and there's a little part that projects the time onto the ceiling that we use as kind of a night light. I give him hugs and kisses and tuck him into bed and his "baby" into bed the same way every night. We do "squeeze" and nosey-nosey (we rub noses like eskimo kisses) and then it's I love you's and night night and I leave the room. He also has a glow worm in his bed that he can push for a little music and light if he needs it, but most nights he'll just lay there until he falls asleep.
Since I bought the sound machine, he's slept through every night and started taking a real nap during the day. Before, it was like 2-3 naps that would last between half an hour and an hour. Now he takes one nap that lasts anywhere from 2-3 hours in the afternoons. Over-tired babies have a hard time sleeping at night. Every child is different. Crib mattresses are much harder than adult mattresses and she may just be uncomfortable in her crib now. You'll find something that works for you. Just don't give up! and if you go with a routine for a solution, the only way it works is if it's the exact same routine every single day.