It's informative to me whenever one noncommercial DJ says to the one who's about to take over, "So, what do you have in store for us on today's show?" When the DJ responds, "Oh, some surprises," I think, "Either the DJ has some great music and/or an unexpected interview with an interesting artist planned, or (s)he woke up later than planned and has to wing it."
The first hour of the show usually clues me in.
