..not that you need it, but when did that ever stop me? :)
When a cat is a young kitten, for some reason it helps "humanize" the cat to scruff-tote it like its Mom would do. The cat has an instinctive "freeze" reflex when grabbed by the scruff. This also works perfectly when they act up. Also hand-fighting (my favorite cat fun) - flip it over and roughly scratch the belly until it really digs into your hand and mock-bites - the cat knows how much is too much. For some reason this results in saner, less nervous adults.