According to tradition prayed 15 times a day from St. Andrew's Day (30 November) until Christmas

Hail and blessed be the hour and moment in which the Son of God was born of a most pure Virgin Mary at midnight, in Bethlehem, in the piercing cold.

At that hour vouchsafe, O my God, to hear my prayers and grant my desires: (Mention your intentions here) through the merits of Our Savior Jesus Christ, and of His Blessed Mother. Amen.

In my experience this novena is very powerful. God seems to be in a giving mood right before Christmas and wants to prepare many hearts to receive the gift of His Son. Remember, if God doesn't give you what you ask for, it's because He has something even better planned. Ask boldly!

Reference: The Little Blue Book, (c) 2011 Diocese of Saginaw (http://www.littlebooks.org)