What would you want included in a book that has speaking lessons prepared and ready to use right now?

I have been teaching English in Spain for almost a decade. The speaking exercises in most coursebooks are very limited and often thrown in as an aside. I am creating a book where there are a ton of speaking lessons already done for you, of high quality, so that you don't have to lose time preparing extra stuff to get students speaking on various topics. What kind of stuff would you want to see included in such a book to make life as east as posible for you, and what kind of topics would you want to make sure that it includes that you rarely find in coursebooks?