Using normal rosary beads, begin with:

Our Father..., Hail Mary..., The Creed.

On the five large beads:

Eternal Father, I offer You the Body and Blood, Soul and Divinity
          of Your dearly beloved Son, Our Lord Jesus Christ
        in atonement for our sins and those of the whole world.

On the ten small beads:

     For the sake of His sorrowful Passion,
  have mercy on us and on the whole world.

At the end of the Divine Mercy Chaplet say three times:

       Holy God, Holy Mighty One, Holy Immortal One,
           Have mercy on us and on the whole world.
 

 "Say unceasingly the Divine Mercy Chaplet that I have thought you.  Whoever will recite it will receive great mercy at the hour of death.  Priests will recommend it to sinners as their last hope of salvation.  Even if there were a sinner most hardened, if he were to recite this chaplet only once, he would receive grace from My infinite mercy. 
 I desire to grant unimaginable graces to those souls
who trust in My mercy."   (Our Lord to St. Faustina)