Michael Kruger has a helpful article on cutting material out of your sermon.
And once you have your God-given audience in mind, then suddenly you have a reason to hone, shape, mold and craft the sermon to connect with the people to whom you are preaching. And when you do that, some things get left out. Some points aren’t as important as others. Some illustrations just don’t work.
And this is, by far, the hardest part of sermon prep. It is one thing to sweep together a bunch of information about a passage. It is quite another to shape that content with real people in mind.
Put simply, preachers need to make a distinction between mining and sifting. Mining is the hardcore research that draws the raw material of a passage together. Sifting is the hard work of picking the jewels out of that material that are needed by your congregation. We do mining because we are textually-oriented. We do sifting because we are people-oriented. Good preachers do both.