On Sunday, all over the world Christians congregate to "hear the Word of the Lord." By Saturday evening all preachers (should) have "every jot and title" in place, their sermons ready for delivery.
Many Pastors are aware of the great responsibility to stand before the congregation and to say: "thus saith the Lord." They were on their knees, begging and crying for the words to deliver, for a specific time and audience.
Others are unprepared and dig out old sermons in the hope that the congregation would have forgotten them.
Others preach favorites like miracle and prosperity theology, which is always a hit!
Whatever you do preacher, your sermon is in the FIRST place a discussion between you and God. Only in the SECOND place you may share God's word with the congregation.
Because your sermon is a contract between you and the Lord : "May these words of my mouth and this meditation of my heart be pleasing in your sight, Lord, my Rock and my Redeemer." (Psalm 19:14)