I was reading over at Salve Regina a prayer of St. Gurtrude the Great. Our Lord told St. Gertrude that the prayer would release 1,000 souls from purgatory each time it is prayed. read alll about the prayer here.
I have added the prayer to the sidebar here and at Mary's Prayer Garden. If everyone prays the prayer each time they come here we can really help many souls to heaven.
This is the prayer:
"Eternal Father, I offer thee the most precious blood of thy Divine Son, Jesus, in union with the Masses said throughout the world today, for all the Holy Souls in Purgatory. -Amen"