For Programmers...

Any code of your own that you haven’t looked at for six or more months might as well have been written by someone else.

- Eagleson’s Law

Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are–by definition–not smart enough to debug it.

- Brian Kernighan

It's hard enough to find an error in your code when you're looking for it; it's even harder when you've assumed your code is error-free.

- Steve McConnell