The rosary is made up of two things: mental prayer and vocal prayer. In the Holy Rosary mental prayer is none other than meditation of the chief mysteries of the life, death and glory of Jesus Christ and of His Blessed Mother. Vocal prayer consists in saying fifteen decades of the Hail Mary, each decade headed by an Our Father, while at the same time meditating on and contemplating the fifteen principal virtues which Jesus and Mary practised in the fifteen mysteries of the Holy Rosary.
In the first five decades we must honor the five Joyous Mysteries and meditate on them; in the second five decades the Sorrowful Mysteries and in the third group of five, the Glorious Mysteries. So the Rosary is a blessed blending of mental and vocal prayer by which we honor and learn to imitate the mysteries and virtues of the life, death, passion and glory of Jesus and Mary.
Also to add, in 2002, Pope John Paul added the Luminous Mysteries, also called the Mysteries of Light:
1. The Baptism of Jesus
2. The Wedding at Cana
3. The Proclamation of the Kingdom of God
4. The Transfiguration of Jesus
5. The Institution of the Eucharist
And so how to say the rosary is as follows:
On the Cross, The Apostles Creed Prayer:
Holy Mary, Mother of God, pray for us sinners, now, and at the hour of our death. Amen.
Glory be to the Father, and to the Son, and to the Holy Spirit.
As it was in the beginning, is now and ever shall be, world without end. Amen.
At the end of every decade we say:
Oh my Jesus, forgive us our sins. Save us from the fires of hell.
Hail Holy Queen, Mother of Mercy! Our Life, our Sweetness, our Hope.
To thee do we cry, poor banished children of Eve. To thee do we send up our sighs, mourning and weeping in this vale of tears.
Pray for us, O blessed Mother of God, that we may be made worth of the promises of Christ.