Decorating the Clinic

So we are in between prime summer time and fall,,,any suggestions on clinic decorations? We just took down the summer/beach-y decorations and now need something to tide us over until we get to the real autumn stuff. Any ideas? We like the things that hang from the ceiling, plastic cut-outs on the walls, etc. But what is our theme going to be? Help!
I was thinking about gettting a diet theme going on, which is good all year round. This months education was on potassium, so maybe we could do something along that area. Down with phosphorus, that kind of thing? Hang large colorful lists on the walls by the entrance that have good vs. bad food choices.