I’d love to be able to say that I can plan, but often I can’t. So I fake it. With standard content, it’s hard to keep things fresh, so most of my planning time goes to finding novelty in either the process itself or other related processes. So it is iteration in a way, but with one difference from your environment, at least half of my students have already seen the previous version of the lesson, so it has to be new enough to kick them back into paying attention.
So I guess you can say I plan for novelty. Because at the end of the day, novelty is often the most powerful tool that any teacher/facilitator/presenter has. That and a touch of insanity.