This is the hard bit. The nitty gritty. It's time to bite the bullet and grasp the nettle. You've had ideas floating in your head for some time and you've got to get them down on paper, or key them in to your word processor.
This is all about gags, gags, gags. Audiences come to a pantomime to laugh. Verbal and visual, they don't mind which. And they don't mind old gags. This is proved by the simple fact that they return year after year and laugh at the same gags.