This is a very brief article. Rarely do I find an article I find so compelling that I simply want to catalog it. So rare is this, in fact, that I've never done it. But I have to give credit where it's due.
So stop whatever you're doing and read this excellent article by the always-frosty Rixx Javix at Evoganda. His advice on "counter-fitting" your ship is excellent, and he gives just one example. Read it. Learn it. Do it.