There are very few preachers who preach good biblical sermons today. The Christian minister should preach sermons that are exegetical in nature and give the congregation an understanding of what the text means, its historical context, as well as ways in which to apply the sermon to living out the Christian life. This is the pattern that is found within scripture- the preachers of scripture open the law and gospel and give the hearers its meaning as well as its application.
Here are a few unbiblical ways in which preachers preach today. We discussed these in Homiletics and they are quite fun (although they should be avoided):
Hobby horse sermons:
The minister relates every sermon to their favorite secondary or tertiary doctrine. (Examples: Satan, the Millennium, the Nation of Israel, Evangelism, etc.)
This type of sermon is begun from the text but quickly launches into space and goes off on tangents that no-one can follow.
Heart on the sleeve sermons:
The sermon is preached with such great emotion that the hearers are moved to great emotional highs or lows....but they do not know what the text was about.
Sky scraper sermons:
Patchwork quilt of entertainment and other things. They are one story piled on top of another. The text is never really developed but the stories and illustrations are piled high as the sky.
A preacher takes a text and he finds a theme and then hops all through the bible making the listener try to follow in their Bibles. It is a string of texts that are connected with a few sentences. (A child with a concordance can preach like this).
Sherlock Holmes sermons:
The preacher wows everyone with the depths and the mystery of the Bible but never really tells you anything about what the text means.
I think that all preachers tend to lean in one way or another to one of these errors. As a Calvinist I have heard some of these from time to time. Although I believe in the doctrines of grace whole-heartedly (and would die defending them) I do not think that every page of the Bible is talking about unconditional election!