I like role play in the "Vignette" genre - just a simple little two of three minute thing that either sets the stage for the session or that the session builds up to. Here's a couple of examples I have done

After being bound, I am told that my ex-wife contacted her, and paid for the session and that she said "no safe word" . Session progresses with interjections about what painful things my wife said to do to me etc

Last session of the day for her and I must help her get ready for her hot date that night. "Do you think he will like this red lipstick?" "Pass me the black panties please"