Peter Mead has some helpful suggestions for tweaking certain elements in one's preaching. I found the following comment to be particularly spot on.
"Instead of passionately pursuing the preaching of the message of the text, many preachers choose instead to preach their message from the text. That is, they use the biblical text as a starting point, but at the end the listeners don’t feel they know the text any better than at the beginning. Don’t preach from a text, preach the text. (I think this is the hardest one to spot in a mirror – every preacher thinks they are explaining the text. Perhaps you should ask someone who knows the Bible well and be ready to listen to what they tell you!)"
Read Peter's entire post here.