Until I happened across a room of pretty girls, and took their picture. The old "yearbook committee" trick of course failed, as this was the yearbook committee. Oops.
I noticed that the lecture hall for my ForTran class was vacant after the class ended, so I'd stick around, and re-teach each day's lesson in my style to whoever felt like hanging around. I got a huge benefit from this, as teaching something is a great way to find out what I really understood and where I was on thin ice. The stuff I realized I didn't quite get either, we'd work through together. A win all around.