Bedtime rituals are really important in getting a child to sleep. If a child has pleasant associations that go with bedtime and can predict what happens every time he goes to bed, the experience is easier both for the child and for the parent.
It almost doesn't matter what that ritual consists of in your house, only that it is pleasant and soothing and doesn't change. Parents who have a regular bedtime ritual find it easier to get their children to go to bed without a big fight every night.
Some suggested additions to your bedtime ritual (you don't need to do everything on the list -- just pick a couple): bath, stories (a fixed number of child-chosen picture books works best), songs, prayers, toothbrushing, listing what you did today and/or plans for tomorrow.
If you have another suggestion that other parents could benefit from, please leave it as a comment below. You could be helping someone else at his or her wits end!
And of course, a night light may become an important part of your child's comfort at night. I hope you enjoy some of the offerings here.