Six played-out teen contemporary tropes (most of which I've used)

I recently saw a teen film, The Duff, which is about this girl who realizes that in her girl posse she's kind of the ugly one. The movie was charming, as I expected, but what I did not expect was how many teen movie tropes it played completely straight (as in, without even blinking an eye about how used-up they were). Now I am probably the last person w…