A cute top that is not revealing, since the mini skirt on its own is revealing. That way, people will focus on the legs if one wears a mini skirt, which is its main purpose.
I would suggest a Hemley top from Hollister, with boots (preferably Uggs) and a chunky bracelet. Do not wear a necklace (it will look like you are trying too hard)! If your ears are pierced, you could wear stud earrings or something really small. No dangling or heavy earrings.