The 7 Sacraments (The Holy Mysteries)

Baptism
Confirmation (Chrismation)
Eucharist
Penance (Confession, Reconciliation)
Matrimony
Holy Orders
Extreme Unction (Annointing of the Sick)

Notes:
A Sacrament is defined as "an outward sign of inward grace" which was instituted by Christ Himself and receives its power from God, through the merits of Christ.

Baptism and Penance are known as the "Sacraments of the Dead" because before receiving them when needed, we are dead in sin.

Confirmation, Holy Eucharist, Extreme Unction, Holy Orders, and Matrimony are known as the "Sacraments of the Living" because one must be in a state of grace to receive them licitly and receive their fruits; they give additional grace to souls already spiritually alive.

Matrimony and Holy Orders are known as the "Social Sacraments" because they are designed primarily for the benefit of society and confer a social status.

Baptism, Confirmation, and Holy Orders are the three Sacraments which leave an indelible mark on the recipient's soul and can never be repeated.