A couple of weeks ago, I taught a two-part Sunday School class on "How to Read and Pray the Psalms." You can get the audio from these classes here:
You can get the handout from the class here.
I hope these classes are helpful to you as we continue journeying through the Psalms together.
I also want to recommend this wonderful blog from a pastor in England: http://prayallthepsalms.blogspot.co.uk/
May the Lord use the Psalms to build us up in Him!