Some random stuff to do when you're bored:
- Take a course on Lambda Calculus (see the PostScript file linked to in the end).
- Indulge in some schadenfreude by looking at some really bad "production" code in The Daily WTF.
- Read Guy Kawasaki's weblog.
- Read Paul Graham's weblog.
- Look at some pictures of rather unsafe situations or some pictures of a bit too overloaded vehicles.