The big optimizations come from refining the high-level design, not the individual routines.
--Steve McConnell
The really good programmers spend a lot of time programming. I haven’t seen very good programmers who don’t spend a lot of time programming. If I don’t program for two or three days, I need to do it. And you get better at it—you get quicker at it. The side effect of writing all this other stuff is that when you get to doing ordinary problems, you can do them very quickly.
--Joe Armstrong
The most important property of a program is whether it accomplishes the intention of its user.
--C.A.R. Hoare