My experience from last year is that sometimes it is better to put a stop on yourself. You know back then, my logic was that it needed to come out, that I hadn't been heard, that I had a right to voice my anger (I wrote it like that in my diary, back then). But since I have changed my mind a bit.
Last year (well technically two years ago, winter '13 and spring '14) what happened it "I set loose the beast" (Release the Kraken!!!). What happened is I spiraled downward in my own hate, my own resentment, my own incapacity to understand why. I dived into it and it got me nowhere. Since then I have learned that sometimes it is better to shift your focus. Sometimes you can only get OUT by forcing yourself to stop it.
Back then my attempts at "releasing" nearly drove me into suicide. It was only when I was forced to change (kicked out of my house, fighting with my supporters) that I began to emotionally stabilize. That's why, I really like the advice that Shimmerz handed out: instead of screaming, putting the emotion into words.
I'm not saying that being vocal is not the way to go. Some of us are not vocal enough and may really need to start expressing themselves and what they feel.