Over the years, I've created a new habit whenever I share a lot of information, be it in a video, in a course, a book or a presentation. I like to end by saying: "If you have to remember just one thing, remember this...".

This helps me to think about what's really the most important thing I'm sharing. And it helps others to know where the priority is.

Plus, as we know from psychology, we tend to remember better what happened at the end of an experience. So finishing by giving one priority gives us more chances for people really remember what we want them to remember.

This is a first draft of a principle that might end up in a book of the "Service Design Principles" series.