First and Foremost: WHEN to book your newborn session? If you are expecting, the time is now! :) To get the creative newborn sleeping poses, your portrait session really needs to be done in the first two weeks of life.
In the meantime, you could schedule a Maternity Mini-session, to capture a few memories of this special time of anticipation. Also, I usually like to take some time before the new baby and find out more about your newborn image plans. Will you be needing announcements, wall portraits, gifts, albums, etc? What is your nursery going to be like, and would you like some Mommy & Me photos to include in your decor? What is your favorite style and pose for your new baby? That way, when the time comes, I can have the kind of props, wraps and backgrounds to suit your plans and style.