1. Visit a cemetery November 1 - 8th. You could just drive through a cemetery nearby your house or work.
2. Be detached from all sin.
3. Pray an Our Father, Hail Mary, Glory Be for the Poor Souls in Purgatory.
4. The plenary indulgence gained is applicable only to the Pour Souls.
5. Say a prayer for the Pope and his intentions (I always add "traditional" intentions of the pope = a) propagation of the Faith around the world, b) peace in the world [not the pachamama new world order nonsense]).
6. Have gone to communion and confession 20 days before or after the act (visiting the cemetery + the prayers).
In some Catholic countries, Catholic pious belief holds that the Souls in Purgatory can hear our prayers directly on All Souls Day. If true, when you talk to your deceased loved one, and they are in purgatory, they can hear you. I believe it.
Happy All Saints Day, and All Souls Day tomorrow.