Develop a culture of biblical and theological literacy. In order to do this a pastor should preach expositionally, teach theology, give away books, and personally model the practical importance of sound doctrine. The members of the church should diligently study the Bible and spur one another on to grow in their love and obedience to God.
Expose false teachers. This is especially your job if you’re the pastor. This doesn’t mean you need to inform them about every bad book or misleading movement they’ve never heard of. But it does mean teaching them to measure every new teaching according to Scripture so that they know how to recognize a false teacher when they see one.
Find more great resources for church health from Mark Dever and 9Marks Ministries at www.9marks.org