Say the Catholic Act of Contrition by repeating the necessary prayer of which there are three versions. In this prayer, address God and go on to express sorrow for sins and offenses. After promising to change and improve your life, finish with word Amen.
Perform the Act of Contrition at the end of the Rite of the Sacrament of Reconciliation, also known as Confession. First, examine your conscience by looking over your life since your last confession. Pick out any sins and quarrels with others. Ask yourself if you have been faithful to your spouse and obedient to superiors or parents. Consider any instances of hate, envy and disrespect.
Next, meet with the priest either face-to-face or anonymously, and make the sign of the cross. Continue by saying "Bless me father, for I have sinned," and proceed to give the length of time since your last confession. Confess all your sins, and finish with the words "I am sorry for these and all of my sins." The third step is to listen to the priest's advice and accept the penance. Finish by reciting the Act of Contrition. At this time, the priest gives you absolution in name of Jesus Christ.