What's Your Following Policy?

Twitter has become an invaluable tool for spreading the word about RockTheCross.net and AshleyBrawner.com, as I know that it has for many other people. I currently maintain two twitter accounts, one for myself, @wesbrawner, and one for RockTheCross, @rockthecross. My general policy is that once or twice a week, I will go through my followers list and follow the accounts that are legit and block the ones that aren't.

So..... What's Your Policy?