Bibs or suspenders with a hoodie
Hood thing like this:
[img=]http://www.easyfreepatterns.com/patterns/114/aliexpresscom-buy-6in1-thermal-fleece-balaclava-hood-police-swat-114528.jpg[/img] (pro tip, those are cheap to buy from ebay)
Trackpants
Cuff your pants to be more trendy than others
Get flexy skis
Swing your arms while skiing
Butters are your favourite tricks
Handrags are the shit
Remember that you are not allowed to spin more than 7
Trendiest tricks you can do on rails are where you spin one way then just tap the end of the rail Quick and 90 the other way. Bs swap to sw, 270 to sw, sw 270 to forward, fs swap to forward are all good examples of those tricks
Remember that instagram is the best place where you can Post ski content
It helps a lot to be trendy if you have good edge control
If you want to have more ideas, just watch some supreme skateboarders skate and think how thing they do could be done on skis