Ok, so I couldn't resist using this shot of Ms. Barrymore. I adore her, but that's not really the point...
When shopping for earrings consider your face shape.
According to Oprah.com:
Hoops are always good.
Pendants are best for square or round faces.
Studs, buttons or short drops suit an oval or long face.
Keep this in mind to find the best pair next time you are in the market.