I find that writing unit tests actually increases my programming speed

One of the big dangers is to pretend that you can follow a predictable process when you can't.

One of the things I've been trying to do is look for simpler or rules underpinning good or bad design. I think one of the most valuable rules is avoid duplication. "Once and only once" is the Extreme Programming phrase.

When you actually sit down to write some code, you learn things that you didn't get from thinking about them in modeling terms...there is a feedback process there that you can only really get at from executing some things and seeing what works

I've learned to always avoid saying "always"

I find that writing unit tests actually increases my programming speed

I can't choose whether someone is offended by my actions. I can choose whether I care.