Make sure 1) she gets plenty of physical exercise throughout the day, 2) her relaxation starts with a quiet, non-chaotic dinner, no yelling, horseplaying, TV or electronics for the rest of the evening, and 3) a warm soothing bath with dimmed lights, in the bathroom and her bedroom, talking in just above a whisper, slowing your voice down as bedtime approaches, rub her down with bedtime lotion and put her pj's on.
Stick to the same bedtime routine every day. Read a story or sing a song to her in a quiet, sloooow voice as you nurse her, put her down and leave, don't go running back in when she fusses. Leave just a nightlight on, if you go in do not turn on lights, don't engage and talk to her, just lay her back down. Get a darkening shade for her window, use it for naps and bedtime. Don't leave her toys where she can reach them if you don't want her to play with them, just a lovey for snuggling. Since she self-soothes turn out the lights, close the door and let her be, the less interaction the more reason to sleep.
As a side note, my parents had 11 children, the babies and toddlers slept through everything, we lived across from railroad tracks, so don't feel you need to keep it dead quiet. Just be consistent, no engaging and she'll have nothing to do but sleep, she'll get it.