One line of praise, said after each decade of the Rosary and at the end of the psalms.
A short doxology: glory given to the Father, the Son and the Holy Spirit, for ever.
When: At the end of each decade of the Rosary, after every psalm in the Liturgy of the Hours, and whenever something good happens.
Why: It turns any prayer toward praise, which is the one kind of prayer that asks for nothing.
Glory be to the Father, and to the Son, and to the Holy Spirit. As it was in the beginning, is now, and ever shall be, world without end. Amen.