Golden Rules for Prayer

I have just begun reading "Finding Your Hidden Treasure" by Benignus O'Rourke (DLT, 2010). It explores the value and the place of silent prayer. Too often, as for other parts of life, we make prayer too busy. In the Introduction O'Rourke suggests two golden rules for prayer (p. 11) - "One is that we have to pray as we can in the way best suited to us, not in the way we think we ought. .... And the other rule is: the less we pray, the harder it gets."