I used to be angry, frustrated, annoyed, cheesed off with everything, but then i got sick of being so hard on myself and on others around me, so I just let it all go.

Nowadays, I hum/sing a song that i find uplifting, over and over again until I get past that moment of frustration. Write down what frustrates you and why it frustrates you and work through each of them.

Next time you feel angry, stop and ask yourself "why am I feeling this way?" - write it down or whatever helps you work through logically why you are feeling the way you are. What is it that is annoying you and making you feel angry.