Learn to read the source, Luke
Atwood wrote: "The idea that you'd settle down in a deep leather chair with your smoking jacket and a snifter of brandy for a fine evening of reading through someone else's code is absurd."Not so absurd, really. Reading well-written source code is a great way to learn the finer points of the art of programming; it's not just for fixing bugs. In fact, entire books have been published that consist of annotated source code, the most famous probably being Lions' Commentary on Unix and Knuth's "TeX: The Program".