Confusing days with nights
She'll never be able to sleep through the night if she doesn't learn the difference between dark and light. To help your child organize her natural sleep rhythms, keep her room light in the morning and during daytime naps. And don't leave a light on in her room at night.
From The Best Advice I Ever Got, by the editors of Parents Magazine, edited by Sally Lee. Copyright © 2001 by Rodale Inc. and G+J USA Publishing.