Be memorable.
If you want to keep your listener coming back show after show, you need to make them remember to come back. You need to remain top-of-mind for your listener. That is the purpose of audience engagement. Make your listener remember you for something specific about your show.
As you build your show, make it about one thing. Find one particular thing that will be remembered. If you try to be all things to all people, you will water down the show. Everything will be nice. However, nice isn’t usually truly memorable. You will get lost in the millions of messages your listener receives on a daily basis.
Find one point that you can make amazing. Take it over the top. Make it the “goodbye” scene in “Titanic”. Make it the “I am your father” scene in “Empire Strikes Back” between Luke Skywalker and Darth Vader. Your particular point could be the point where you assure your caller that everything will be ok. It could be the fantastic story of your brush with celebrity. It is your show. Find the magic.
Stir emotion. Make it amazing. Bring your listener back. Be memorable.