I want you to work hard, not for yourselves, but for the greater glory of God.

Keep on repeating those words to yourself. Have great carefulness in prayer. Pray hard; take pains to pray. Hate a sleepy prayer. Rouse yourself up with a good pinch, stand up, and determine you will pray.

If we realised that our prayer, even when we're distracted, gives glory to God, we would try harder. Resolve to discipline yourself to pray. It will bear much fruit.