This is a question I am asked by people who havn't worn belts in awhile.
First off, wear it however you feel it looks best on you. For other ideas/inspiration read on!
wear a custom made belt and really make a plain outfit pop!
This can look great on any type of longer tunic top, dress, or my favorite, a vintage slip dress worn with cowboy boots.
One of my favorite designers who offers vintage slip dresses is Glamarella Junk, http://glamarellajunk.blogspot.com/
Her style is fabulous and her items are beautiful!
I am adding a photo of hers with a belt worn in the style I mentioned above. To add a little modesty to this you could add a little black swing jacket and some black leggings with great black sandals or boots. For a more casual look you could add a jean jacket and cowboy boots.
Seductive Peacock Belt Buckle