Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's law.
One of my most productive days was throwing away 1000 lines of code.
Controlling complexity is the essence of computer programming.
Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.
The key to performance is elegance, not battalions of special cases.