Even if you missed the first few days, join in the traditional Christmas Novena. Beginning on St. Andrew the Apostle's feast day, November 30, the following beautiful prayer is traditionally recited fifteen times a day until Christmas.
Hail and blessed be the hour and moment In which the Son of God was born Of the most pure Virgin Mary, at midnight, in Bethlehem, in the piercing cold. In that hour vouchsafe, O my God, to hear my prayer and grant my desires, [here mention your request] through the merits of Our Saviour Jesus Christ, and of His blessed Mother. Amen.