You need to equip yourself with a great waterproof ski jacket. Make sure to find one that has a few easily accessible pockets. This is useful in case you want to grab your phone for a photo or enjoy a granola bar on the chair lift.
They keep us warm, go on easily, and are super comfortable for a long day on the slopes! Of course, if you envision taking off your ski pants to hang out in the lodge, you might want to wear a thicker pair of leggings than some base layers.