Another thing you can do is to talk about yourself endlessly. If they say, "How are you doing?" Tell them EVERYTHING. Every last detail, especially if it's all a bunch of bullshit. NEVER EVER EVER say, "Fine, and you?" Because if you ask them about their day too, they WILL reciprocate, and you'll never be rid of them. Oh, and try to contradict everything they say and back it up with "the latest study from Discover Magazine..." and so forth. If you're always right, you'll never make any friends, so if you pretend like your opinion is the be all end all in every single conversation, then you'll not make friends with these losers. Sometimes you have to be something you completely hate in order to get what you want (or get rid of what you don't want). Opposites attract, as we all know, so if you act like an asshole, you will repel the other assholes.