Music is all about emotion, expression and connecting with that feeling. When angry, put the workout books away, play a tune (from recall - no sheet music required) that comes to your mind at the time such as "Take this job and shove it", and play it like you feel it. Deep breathing excercises? Playing the trumpet IS deep breathing excercises. Angry? Then get in touch with your innerself, chose the tunes to communicate the feelings, then go blow your brains out[discaimer - figuratively]. This is cathartic. I am a physician, that absolutely recommends this therapy. And it's cheaper than paying for the psychiatrist (which I am not).