HOWTO unshrink a garment

Ever shrunk a garment in the dryer? I'm a laundry freak, and a pretty careful one, but I know I've done it (and inevitably, it ends up ruining something my wife's just bought). Turns out there's a way to unshrink clothes: soak them in baby shampoo or hair conditioner, then stretch them out (ideally, by wearing them) as they dry.