Branch Curtain Tie-Back - Urban Outfitters Crisp white or off white curtains seem to mature (in a good way) a room. Putting more classical elements like this in contrast with more funky pieces creates a pleasing look.
Cabinet hardware, like glass drawer pulls, makes attractive drapery hardware as well. These vintage crystal knobs offer a place to hook thin loops from the top of a sheer fabric valance. just saving as an idea