Depends on a wide variety of variables.
There is no one size fits all method.
A pastor friend of mine had a lady who was just a spiritual vagabond with no credibility whatsoever get up and start giving out a "tongue" once when he was in the process of getting ready to dismiss a Sunday morning service.
When she got done, he said, "Yea I say, let's go eat lunch. You're dismissed."
The message was communicated.