Pray the Rosary.
In "The Secret of the Rosary" by Saint Grignion de Monfort, the great Saint says the following:
>"Even if you are on the verge of being damned, even if you have one foot in hell, even if you have sold your soul to the devil as sorcerers do, even if you are a heretic as hardened and obstinate as a devil, sooner or later you will be converted and saved, if--mark well my words--if you pray the Holy Rosary devoutly every day until death for the purpose of knowing the truth and obtaining contrition and forgiveness for your sins."
The Rosary is the ultimate prayer, containing both verbal and meditative prayer. During each decade of the Rosary, we meditate on the life of Jesus Christ through the eyes of His Mother.
The Rosary is the prayer of the gospel, the complete contemplation of Jesus Christ's life, death and glory.
Saint Monfort goes on to say:
>"No one can disapprove of the devotion of the Holy Rosary without condemning what is most sacred in the Catholic Faith: i.e., the Lord's Prayer, the Angelic Salutation, and the Mysteries of the Life, Death, and Glory of Jesus Christ and His Holy Mother."
Saint Bonaventure says:
>"He who neglects devotion to the Blessed Virgin will die in his sins and be damned."
Finally, to all who say the Rosary is a "vain repetition". I would remind one that Jesus Christ gave us the Lord's prayer to recite word for word. We are instructed to "pray ceaselessly". Even the Angels in heaven repeat "Holy Holy Holy is the Lord God almighty, who was and is and is to come" without ceasing... David repeats in his psalms over and over again.
The Rosary is anything but vain. However the correct rendering should be understood as "do not pray with empty phrases". The Rosary is by no means empty.
>"Charity believes all things" (1 Corinthians 13:7), whereas pride easily leads us to deny almost all well-authenticated narritives, on the pretext they are not in Holy Scripture. Such pretext is one of the devil's snares."