I've posted this before and this is really a reminder to myself to always pray for my children (you can replace "daughters" with children or sons).
Holy Mary, mother of God and mother of all the faithful, I place my daughters under your motherly protection. To you I completely consecrate them, body and soul. Take them under your care and keep them always. Guard them and keep their hearts pure, their thoughts ever holy and directed to God and the things of God. Protect them always throughout life - in their joys and sorrows, in successes and failures, in dealings with others. Always and in all things be a true mother to them, Mary, and preserve them. I commend them entirely to you. Remember, Mother Mary, that through this act of consecration they become in a special way your children as well as mine; guard them and keep them as your very own. Amen.