Losing My Mind.....

My 3 year old son is driving me insane. Yesterday was awful and he woke up today in a much similar mood. Cranky, defiant, loud, stomping around...you know, normal 3 year old behavior. -_- He's already been in time-out for trying to stomp on my foot. He's in his room with my iPod trying really hard to break it, I think. lol So, the question is....what is the matter with him? Why is acting this way? What can I do? I'm seriously at my wits end with him and his acting out. Blah. Anyway. I'm off in search of answers. The only thing I can come up with is growth spurt. Or just....he's 3!!! lol