These are the suggested prayers preceding your daily Kathisma, known as the Trisagion prayers.
Glory to You, Christ our God, our hope, Glory to You!
Heavenly King, Comforter, the Spirit of Truth, present in all places and filling all things, Treasury of Goodness and Giver of life: come and abide in us. Cleanse us from every sin and save our souls, O Gracious Lord.
Holy God. Holy Mighty. Holy Immortal Have mercy on us. (3 times)
Glory to the Father, and the Son and the Holy Spirit, both now and forever and to the ages of ages. Amen.
All Holy Trinity, have mercy on us. Lord, forgive our sins. Master, pardon our transgressions. Holy One, visit and heal our infirmities, for the glory of Your name.
Lord, have mercy. (3 times)
Glory to the Father, and the Son and the Holy Spirit, both now and forever and to the ages of ages. Amen.
Our Father, Who art in Heaven, hallowed be Thy name. Thy Kingdom come, Thy will be done, on earth as it is in Heaven. Give us this day our daily bread; and forgive us our trespasses, as we forgive those who trespass against us; and lead us not into temptation, but deliver us from evil.
For Yours is the Kingdom and the Power and the Glory of the Father and the Son and the Holy Spirit, both now and forever and to the ages of ages. Amen.
Then read your Kathisma, and finish by saying a 'Lord, have mercy" for each of the Psalter Group members individually by name.