This year I set up a Geometry Timeline on my only bulletin board in the classroom. I kept track of each unit, and the posted the vocabulary and postulates/theorems we learned. Here is what it looked like:
My other project is to create more bulletin boards in my classroom. I hate only having one. The teacher that had the room before me ordered a ton of foam boards, so I want to use those to somehow create more bulletin boards. Stay tuned for how that project turns out.