I suggest CD stories and lullabyes! Find a CD with no lyrics, just a nice instrumental. Twin Sisters has a nice one called Nature Sounds. Anyway, after she lays and listens to a story on CD (Scholastic has tons to own, and the libraries has lots too) she will be relaxed and her mind will be focused on the pictures she made in her mind. Then start the music. If you can get a CD player with a repeat option, use it to play it all night long. Then if she wakes up in the night, there is music to tell her brain it is still sleep time.
Also, when my son was afraid of the dark we got him one of those glow worms that has a face that lit up If he woke up scared he squeezed it and had light. Even now at 8 he uses a Glade Light Show air freshener that glows different colors on the wall. He says watching the colors helps him relax.