Last time I posted, it was about prayer. It was specifically about Christian prayer. Since then, I was privileged to listen to several wonderful sermons on Christian prayer. Now that I am once again reminded of what prayer is, and how we ought to pray, I want to point out a possible misunderstanding from my previous post.
"Cliche" is not the worst enemy of the prayer. What I think Eugene Peterson was suggesting was that we shouldn't just recite the words and think we prayed. In the similar light, but perhaps a bit more concretely and explicitly, Phillip Jensen points out from Matthew 6:5-15 that it's the sincerity and the content that matter over the length, eloquence, strict style or frequency. And it all has to do with who God is.
There are several other sermons on prayer by Phillip Jensen, but this one maybe a great place to start.
(note: the audio quality isn't so great on this particular sermon, but I don't think you'll find it hard to follow.)