I used to be a very angry person, the state of the world annoyed me , council, government, adverts, news, tv, people, motorists. All at one time or another would grind my gears then one day I just stopped caring, I keep myself to myself now, dont watch the news, dont read papers, avoid people when ever I can, travel when its least busy, things like that. Also spend more time doing what I want, I find im a much calmer person as a result of it.
I still get annoyed mind, just not as much, mainly in the car I think, some people are very inconsiderate when driving, using mobiles, not indicating that sort of thing.