Dr. Martin Luther wrote two small prayers for families and individuals to use to begin and end each day.  These two prayers by Dr. Martin Luther can be found under the Daily Prayers section of Luther's Small Catechism.

Luther's Morning Prayer

Make the sign of the holy cross: In the name of the Father and of the Son and of the Holy Spirit.  Amen.

I thank you, my heavenly Father, through Jesus Christ, Your dear Son, that You have kept me this night from all harm and danger; and I pray that You would keep me this day also from sin and every evil, that all my doings and life may please You.  For into Your hands I commend myself, my body and soul, and all things.  Let Your holy angel be with me, that the evil foe may have no power over me.  Amen.

Luther's Evening Prayer

Make the sign of the holy cross: In the name of the Father and of the Son and of the Holy Spirit.  Amen.

I thank you, my heavenly Father, through Jesus Christ, Your dear Son, that You have graciously kept me this day; and I pray that You would forgive me all my sins where I have done wrong, and graciously keep me this night.  For into Your hands, I commend myself, my body and soul, and all things.  Let Your holy angel be with me, that the evil foe may have no power over me.  Amen.