The Christianity Today leadership blog as a good piece up on the dangers of practical preaching.  The basic premise is that we should be spending time teaching our people how to think and not so much of a focus on giving them the bottom line.

Here is a quote from the story:

The Bible spends much more time on shaping the spiritual mind than commanding particular behavior. We need far more training in the ways of grace, of spiritual perceptions, and of what God is really like, than we do in how to communicate with our spouse. Understanding the glory of Christ is far more practical than our listeners imagine. Properly preached, every sermon based on a passage of Scripture is fundamentally practical. Every author of Scripture wrote to effect change in God’s people. It is our job as preachers to find the persuasive logic of that author and put that clearly and

Source: http://blog.christianitytoday.com/outofur/archives/2006/09/the_danger_of_p_1.html

It is a good debate.  Think on these things.