As tempting as it is to fill your slides with stuff,...
...often de-decorating is the best policy.
Any writer or designer will tell you...
...that 90 percent of the creative process is destructive.
Do you have one main point?
Consider putting just one word on the slide by itself.
You want them to remember a few items?
Then don't show everything at once.
Instead, show one item at a time.
Do you have a picture that accurately expresses your idea?
Scale that picture so it fills the slide.
Do you know a quote that says it all?
Then let it say it and remove everything else.