I made a pretty rad mix for one of my classes. The theme was just "Fire/Water" and it was divided into two sides, one of which was all songs with fire or fire-related things in the title, and the other side with... well, you know. What I was especially proud of was the fact that each side was about 40 minutes, meaning each one could theoretically fit on an actual cassette tape and sound completely awesome. The tip of the hat that I made to mix tapes was that each side ended with a Weakerthans track.
Tyler, have you thought of including a track by The U.S.A. Is A Monster?