Growing up and going through school, I always had to make these little cheat sheets which consisted of a tiny piece of paper crammed with as much information as possible about trigonometry or some other subject. We were allowed to bring that sheet in with us when writing a test.
I used a lot of highlighters and different colored pens. In the end, I didn't care much for any content on that paper, but I was always excited to see how the sheet looked--how the information was organized.
Here is a cheat sheet for experiencing Newark.