Things I learned from this thread:
Keffiyehs are a no go unless you are being an ironic hipster at which point you're being an ironic hipster and that's a no go.
Crocs and Uggs are okay but only! if you are wearing them inside and no one sees you wear them.
People like scarves.
Tights as pants are not cool.
Rinse and Repeat.
Tight pants and Keffiyehs are in the same boat as they had there 3-5 years in the sun and we are slowly moving on. They are both still very wearable, though absolutely skintight tight-pants are still and always were a no, and Keffiyahs no longer have political significance so pretending they do is douchey.
Crocs are going out of their way into finding ways to trick you into thinking they arent Crocs, so they lets change that to *most* Crocs should ever be seen. Uggs were never a bad thing, people just hate them because everyone has them or talks about having them, ooooh they are too popular, time to up the down and hate on them, right? Wrong!
And there is nothing inherently wrong with being a hipster, just once again dont be a douche.
Basically there are 2 may pieces of fashion advice.
1) Dress your age, and in a style that suits your body/look/lifestyle, and make sure you are at least a little bit uncomfortable, then put on a blanket of confidence
2) Dont be a douche.