6. How to sugarcoat things like a pro
The thing about working in clothing is that if someone asks "do these skinny jeans make me look fat?" you can't say "well actually, yeah. It looks like you're smuggling two midgets out of the fitting room in your thighs." As much as you may want to tell someone that they should maybe spend that hundred bucks on a gym membership, you learn to say things like "oh, our jeans run a little small, you might want to size up." It's almost like that movie Inception... except just blatant lying.