One of the best ways to show the congregation that you prepare is to preach to the occasion. If it is youth day, preach to the youth. Youth sermons may prove to be the hardest sermons to perform because they involve all of the intense exegetical and theological work of any other sermon, but they also require another big step. Youth sermons require one to posit intensely deep messages in language and life experiences that children can understand.
If you are asked to preach at the Usher’s annual day, preach about that, likewise for Menâ€™s day, Easter and the like. A minister friend of mine often jokes about attending a sunrise Easter service in which all of the preachers kept preaching Good Friday texts, and continually going to the cross out of habit. He said to me â€œman donâ€™t these folks know Friday was two days ago, itâ€™s Sunday, and today He got UP.â€ Likewise, we donâ€™t want the congregation saying, “Doesnâ€™t the preacher know what today is? Menâ€™s day was last month and today is Womenâ€™s day.”
To conclude, if you have been called to preach a sermon, preparation means that you know the occasion otherwise you are opening yourself up to certain embarrassment.