I loved the book by Paul David Tripp, Dangerous Calling (Kindle | WTS). I listened to his TGC talk via the TGC podcast yesterday, "Dangerous Calling," and it was wonderfully convicting. It's still pursuing me. I don't quite like how he handles the issue of sermon prep, though I agree with him in theory.
Check it out if you are a pastor, a pastor's wife, or if you need to know what your pastor may be going through. And if you are a pastor, don't just listen for you. Listen for the sake of your wife. It's in your face, but it's good.