There are chances that you will already have evening dresses for events. You may only have one or two but at least you have something. The problem is that you may want your favorite dress to look slightly different without having to do too much. This is done with some carefully chosen accessories.
You will need shoes and a purse for all evening dresses and you can opt for a different color compared to the dress. However, these will not make a dress look different. You will need to start looking at your other accessories, including your jewelry and items like a shawl. You could also consider hair pieces so that you have your hair worn a different way. If you had your hair down for an event, putting it up for another one will help to show off different parts of the dress. Belt jewelry could also add more to the waist to make it look completely new.