For any Christian for whom prayer is becoming formal and stereotyped, the Psalms provide a rich source of inspiration. It is true that to read the Psalms on your knees, as it were, can be a great boost to one’s prayer experience. The book of Psalms provides the most sustained and concentrated biblical expressions of prayer. There are two qualifications I would make to this recommendation to resort directly to the Psalms for prayer.
You can read the two qualifications he makes about praying the Psalms at the link below. Great insight into the significance of the Psalms for prayer.