A sermon that tries to say everything about a passage usually ends up saying nothing memorably. Start by choosing one central idea — the single sentence you want someone to remember on Wednesday, not just Sunday — and build everything else in service of that one idea.
A workable structure many preachers use: open with a real, relatable tension or question, move into what the text actually says, explain what it means, and close with a specific, concrete application — not "apply this to your life" in the abstract, but one actual next step someone could take this week.
Illustrations should clarify the idea, not just entertain around it. A story that is memorable but disconnected from the central point often becomes what people remember instead of the message itself.
Finally, write for the ear, not the eye. Sermons are heard, not read — shorter sentences, natural pauses, and a conversational rhythm carry much better from a stage than dense, essay-style prose ever will.