I have to admit I have never been to one of those sessions where they tell you to breath in out, uuh aaah, aah aaah and all will go away. I think it depends on how messed up you feel about something. I have tried one though , its fast, cheap and effective.
When i feel slighted and cant get it out, for fear of blow!, resignation!,e.t.c. I just quietly wait till its late, entice them to my dreams and thrash the hell out of them. I wake up in the morning feeling, boo ya! thrashed you yesterday and u were such a helpless puppy.lol
Let me know if this works for you! Just don't kill anyone, contain yourself!