To receive this Indulgence you need to:
- Go to the Sacrament of Reconciliation within 8 days before or after the first Sunday of August.
- With a contrite heart, go to a parish church and attend Mass and receive the Blessed Sacrament on the First Sunday of August.
- Pray the Our Father, the Apostles Creed, and a prayer of your choice for the intentions of the pope. Here are some Beautiful Prayers you can use for this occasion.
I first heard of this indulgence listening to an old podcast by Franciscan Friar, Fr. Seraphim Beshoner of Catholic Under the Hood. You can listen to this on your iPod, any mp3 player, or just on your computer. He has some good information there. Other good sources of the entire story behind this indulgence can be found at the FriarsMinor.org site and Penitents.org.
For more information on indulgences in general, check out these articles from Catholic Answers:
Primer on Indulgences
Myths About Indulgences
What is Wrong With a Little Indulgence?