The minor Office of None today has a reading from the Letter to the Hebrews (Heb. 10: 35-36) that one needs to reflect on once in a while when prayer turns dry and distracted.
“Do not abandon your faithfulness, for which is reserved a great reward. You have only to be constant in fidelity so that after having done the will of God you might obtain his promises.”
The Lord only asks us to be faithful to the tasks he assigns us. He alone will bring forth the fruit of our fidelity. Blessed Mother Teresa was fond of saying the God doesn’t ask for great successes, only faithfulness.
The Liturgy of the Hours is a great way of expressing our faithfulness in prayer, even if we are lacking in fervor or concentration on any particular day.