Prayer is not sending in an order and expecting it to be fulfilled. Prayer is attuning yourself to the life of the world, to love, the force that moves the sun and the moon and the stars.
~ from THE MUSIC OF SILENCE by Br. David Steindl-Rast
Be constant in your practice, and one day the One who gave you the desire for the prayer of the heart will give you that prayer itself. When your heart's intention is fixed on God, it will keep lit the incense of your prayer, and wind of distraction will not put it out. do not worry about stray thoughts; they may come and go, but they will not take your attention away from God.