growing up, i relieved a lot of stress by taking it out on weights. I would just lift to the point where I couldn't move my body. I guess it allowed me to control my own pain rather than enduring the feeling of i can't control it.
I also went to batting cages...very helpful & really allows you to be as aggressive as you want to be.
I ususally try to be at least somewhat use a healthy outlet that will let me get more from it