Let's all face the facts. You're never as cool as you seriously think you are. In the words of Bobby Digital "you ain't shit your momma ain't shit your daddy ain't shit." Spoken like a true poet. It's the human condition to always think you're the bomb, that your gods gift to men (or women, whatever) but in actuality you need to eat a big piece of humble pie. Acting like a decent human, having manners and class will never go out of style.
So take it from me, if you think you're the shit well, trust me you are NOT. You're probably just loud and obnoxious and endlessly embarrassing. You're not cool, you're not "in with the in crowd" you're not as awesome as you think.