John Piper spent 6 weeks going through a selection of Psalms in a very powerful series of sermons. The theology and practical Christian life application that comes from this is priceless. I would love to see John Piper produce a sermonic commentary on the entire book of Psalms. He has a gift for making them come alive.
Songs that Shape the Heart and Mind: Psalm 1
Spiritual Depression in the Psalms: Psalm 42
A Broken and Contrite Heart God Will Not Despise: Psalm 51
Bless the Lord, O My Soul: Psalm 103
Pour Out Your Indignation Upon Them: Psalm 69
Declare His Glory Among the Nations: Psalm 96