I've seen a lot of articles around lately about how to pick and choose a search engine optimization company. That's fine and dandy, but it often works the other way around in this industry. The most successful SEOs pick and choose their own clients. Good SEOs can spot a tire kicker from a mile off and I know of a few SEOs that quickly "fire" clients that give them too much grief. Why? Because they can. Their reputation is widely known and they are constantly in demand. Many of them are too bus.