Let's face it; everyone gets pissed. We have so much going on in our lives..school, work, family, friends, significate others, possibly pets, etc etc. Sometimes life gets over-whelming, and it's ok to figure out what to do with all the pent up anger/frustration you may have bottled up inside. What's important, is that you find a way to relieve that tension, because it's not good to keep it inside. Do something you enjoy; talk a walk, read a book, write poetry, listen to music, punch something, scream, etc. Do what feels good and allows you some relief. When you feel better, it will show in everything you do.