Discipline within evangelical churches seems to have become something of a concern for pastors. What are some of the legitimate means that pastors can use to discipline their flock?

I am interested in the legitimate means that pastors and senior church members can use, if at all, to control and discipline their flock. I personally do not think that they should be employed. However, I have read that a return to discipline of what are perceived to be errant members is becoming increasingly popular amonst church leaders. Is this acceptable? And what instances, if any, should discipline be administered and how?