The «Keep It Simple Stupid» phrase is from the design world.It basically mean, don’t do things unless you don’t have to.It is a very powerful rule in presentations also.
Do yourself a favor, go through your presentations and look at every slide and every detail. Ask your self; is this necessary? Does it contribute to my story?
Be hard on yourself and remove everything that doesn’t really need to be there. Be as clear and precise as you possibly can. Maybe you have a cool chart or graph that you really wanted to show, but unless it contributes to your story, take a deep breath, sigh, and delete it.