Today is All Souls Day, the day when the Church commemorates and prays for the holy souls in Purgatory undergoing purification of their sins before entering heaven. And while there are many prayers specifically for All Souls Day, I especially like the prayer of St. Gertrude the Great Though not actually an All Souls Day prayer, I think it's appropriate for the day. The Lord told St. Gertrude that a recitation of this prayer in a heartfelt manner will release 1,000 souls from Purgatory every time it is said. Pretty powerful! This prayer can be said daily, it needn't be kept for special occasions. Something nice to do for our dearly departed.
The Prayer of St. Gertrude the Great
Eternal Father, I offer you the most Precious Blood of Your Divine Son Jesus, in union with all the Masses being said throughout the world today, for all the Holy Souls in Purgatory. Amen.