As a child, I would bottle everything up and explode at random moments. When I would, I'd knock over things, pound my fists on the walls, floors, tables, and so on, and I'd scream at the top of my lungs. It would be a tantrum in the biggest sense of the word.
Once I began managing my anger, there came a point in time where I never really became angry. I was easygoing and laughed things off.
Now I'm reverting, lol. I snapped in class the other day after a teacher gave me a homework assignment I was never given the day previously, then took it back five minutes later because we were all handing it in. It wasn't the angriest I've ever gotten (though I haven't been as angry in a long time), but my quickness to anger frightened me.
Based off of my reaction at that point, whenever I'm angry, I swear uncontrollably and (since I was told as a child that letting out what was angering you would relieve anger) basically rant about whatever is pissing me off. I mean, I don't go around to everyone and ask for them to feel sorry for me, but I just put out why I'm angry. In general, when I'm pissed, I tend to avoid others once I know they know why I'm angry. Contrary to when I'm depressed, I don't want to deal with people when I'm angry.
To alleviate the anger, usually I just simmer for a while (which sometimes involves kicking walls and pacing), and then either listen to angry-sounding music or write out my emotions on paper or on Word. By the time I'm done with the song, I'd have cooled down enough to want to listen to another song, and by the fourth song, I'm feeling a different emotion. As for writing, by the end of the document, I've completely calmed down.