From Fr. Z.’s blog:

“Here is how you can obtaining a Plenary Indulgence on November 2, All Souls:

* make a good confession within a week before or after All Souls
* be free from all attachment to sin, even venial sin, for a plenary indulgence
* visit a church to pray for the faithful departed
* say one “Our Father” and the “Creed” during a visit to the church
* say one “Our Father” and one “Hail Mary” for the Pope’s monthly intentions
* receive Holy Communion, on the same day or soon after

“To obtain a Plenary Indulgence from November 1 to 8:

* make a good Confession within a week of before or after All Souls Day
* be free from all attachment to sin, even venial sin, for a plenary indulgence
* visit a cemetery and pray for the dead
* say one “Our Father” and one “Hail Mary” for the monthly intentions set by the Pope
* receive Holy Communion worthily on the same day or soon after

“Several indulgences may be gained on the basis of a single confession but only one may be gained after a single good reception Communion and prayer for the Pope’s intentions.”