I use a hammer, and crush the head. I don't like seeing a severed head gasping for air while the body is off flapping around. WHICH one is the turkey??? Watching two things that were ONE slowly die, leaves me with a crisis of identity. (A prayer of gratitude helps settle my emotions, but doesn't leave me any less confused.)
Anyway, if you wear glasses, remove them before attempting to catch the turkey. Wear long sleeves, and expect to take a beating. I've always dry plucked. It takes time, but if it doesn't have to be perfect, it will take a lot less time.