I've found it a healthy practice to Wordle my sermons. Wordle is a program that generates word clouds. It is helpful in that it shows what the focus of the sermon is. This practice is beneficial because it can show if the sermon is being faithful to the biblical text.
Last night I preached on Matthew 5:48, which says, "You therefore must be perfect, as your heavenly Father is perfect." (ESV)
My Wordled sermon is below. I have to admit that I wish there was more of Jesus in it. I hope what came out my mouth was more Christ-centered than this Wordle cloud suggests. Click on the image to see in detail.