There are a few different ways that you can accessorize a one shoulder top. One way is to wear a statement necklace. This will help to dress up the look of the top and make it more formal. Another way to accessorize a one shoulder top is to wear some dangly earrings. This will again dress up the look of the top and make it more evening appropriate. Finally, you could also add a bracelet or ring to really complete the look.