This depends on a lot of factors. When I was a child, my teachers sent me to some anger management group. I never felt like I was that angry of a person. I think the group could have been almost counter productive because I was a pretty good kid, for the most part, but they put me in a room with a bunch of pre-teens who already have problems with alcohol and the law. Whatever anger I may have had I just grew out of, it seems. I think I just didn't like being told what to do and  that it basically what happens to you until you're an adult. To answer the question about how to deal with others with anger issues, if it's a kid, just be patient, loving and understanding. It should pass. If it's an adult, I would just avoid people like that. You don't need those influences in your life.