Using St Teresa of Avila's method of Mental Prayer we use the Crowning of Thorns for our meditation.  Our Lady of Fatima requested that we attend Five First Saturdays of Confession, Mass and spend 15 minutes meditating on the Rosary.  Obviously one could not say five decades of the Rosary in that short time so we realize that She must have meant us to Meditate upon the Mysteries.  These Meditation and Mental Prayer podcasts will help with an understanding of how that can be done.