I've been thinking about how to wear my dupatta and I'm pretty sure I've got it figured out. Check out how Aishwarya wears hers in Jodhaa Akbar:
I think this is nice, except that my blouse is longer and more decorative, so I will probably not drape it across the front. I'll just have it hang straight down from the right shoulder. I like how it tucks in at the waist, though.
There may or may not be a part of the ceremony at the very beginning where my face is covered. (Surprise! It's me!) If we do that part, I'll wear it like this:
Actually, the dupatta in this photo looks a lot like mine -- red, sheer, with little sparklies on it and a heavy-ish border.