Prayers for the Holy Souls in Purgatory
1. Have Masses said for your departed loved ones, especially on the anniversary of his or her death.
2. Offer your Holy Communion for the Soul's in Purgatory
3. Eucharistic Adoration: visit the Blessed Sacrament to make acts of reparation to the Sacred Heart of Jesus on behalf of those in purgatory.
5. Prayer of St. Gertrude for the Holy Souls: this prayer is attributed to St. Gertrude the Great and was the prayer by which she obtained the release of many souls from purgatory.
7. Rosary for Holy Souls in Purgatory
10. Pray the Office of the Dead. You can find this in your volume of the Liturgy of the Hours or online here.
11. Ask for the intercession of saints who were known to be great friends of the Holy Souls during their lifetime to join you in prayer for the faithful departed: St. Nicholas of Tolentino, St. Gertrude the Great, St. Catherine of Genoa, St. Padre Pio, St. Philip Neri, St. John Macías, St. Faustina Kowalska, St. Joseph, Our Lady, and others.
12. Repent of your offenses against God and go to confession: Confessing your own sins makes your prayers for souls of others more effective.
14. Sacrifices: practice small acts of self-denial throughout your day and offer these penances up for the poor souls.
16. Special prayers: Throughout your day, offer up short and spontaneous prayers (ejaculatory prayers) for the holy souls. Consider buying purgatory books with more prayers and special devotions for the Holy Souls.
17. When passing by a cemetery, pray the short Eternal Rest prayer. This prayer carries a partial indulgence applicable to the poor souls: "Eternal rest grant unto them, O Lord. And let the perpetual light shine upon them. And may the souls of all the faithful departed, through the mercy of God, rest in peace. Amen."
18. Sprinkle holy water on the ground: St. John Macias, a great friend of those in purgatory, would often sprinkle holy water on the ground for the spiritual benefit of the suffering souls.
19. Visit a cemetery: Pray over the graves of your departed loved ones, or visit a random graveyard and pray for those who may have no one to pray for them. Simply doing this gains a partial indulgence for those in purgatory.* While you're there, sprinkle holy water on the graves. If you make this visit during the first eight days of the month dedicated to the Holy Souls (November 1-8) you can gain a plenary indulgence applicable to the souls in purgatory.
20. Spread devotion to the Holy Souls: Make others aware of the great need these suffering souls have for our prayers.
13. Obtain indulgences: Indulgences reduce or cancel the temporal punishment that we incur through sin.* There are many ways to obtain indulgences through pious actions, and we can apply their merits to the dead. You can find a partial list of indulgences here.
If you visit a church or oratory on All Souls Day and there recite the Lord’s Prayer and the Apostle's Creed, you can earn a plenary (full) indulgence applicable only to the souls in purgatory (under the usual conditions).*