This one is often used to conclude other prayers and sometimes to introduce them or otherwise punctuate them in some way. It's used so often that you will memorize it without intending to memorize it.
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.
Gloria Patri, et Filio, et Spiritui Sancto, sicut erat in principio, et nunc, et semper, et in saecula saeculorum. Amen.