#1:
You know what I really hate? I mean, really, really, really fucking HATE? The kind of person that feels personally validated when they make another person feel bad. Seriously. None of this "Everyone Needs A Thick Skin"-type shit. Hurting someone else's feelings shouldn't make you feel better, or tougher, or anything of the sort. Hurting someone else's feelings should make you feel like a dried up little piece of catshit. I'm sick and tired of watching people take out their frustrations and stress on other people. If you're the kind of person who does this, fuck you.

#2:
Don't lie to make yourself sound cool. It makes you look like a complete dick.