Use it on the inner V to make you look more awake. You could blend it well under eyebrows to define their shape more and highlight. You could also use the white eyeliner to make a white line kind of where a cat line would come out when you have different color eyeshadows around it to make a really unique, out there kind of look. I've seen Nireyna (sp?) do it before; gorgeous technique.
Use it on the inner corner of your eye as a highlight
Use it under eyeshadow as a base
Apply it under your eyebrow as a highlight
Apply a little on the cupids bow to make your lips look bigger