I talk about the actual route we'll be riding on and the kinds of things they may have to call out/ deal with along that way - like "when you're out among the cornfields you can go two abreast and chat, but don't turn into a giant amoeba clump, **and** pay lots of attention so that you single up for a car to go by [depends on the road] becuase sometimes we tend to act like we're in a *car* chatting to a passenger when we're riding two abreast, and there are a few fundamental differences involving major structural metalworks not being between us and the other cars and pavement."
Oh, and "announce if you're slowing, stopping, turning, or blowing your nose."
And... when you stop, get ***all the way*** off the road. We tend to think we're in a parking lot sometimes...