Rules of Programming: Always Try to Improve Code You're Working on
There's always a time when a developer has to work on code that was written before, whether it was by the developer or by someone else. To many developers, this is a pain. A real pain.
However, small improvements can be made, by refactoring the code. Each time the code is touched, it has to be improved. It doesn't have to be something revolutionary, just small bits of refactoring.
This way, after a couple of times, the code will be far more like the modern programming we're striving for, thus making it easier and funnier to work on.
Rule #1 of programming:
Always try to improve code you're working on.