Often, I shoot mine outside. Of course the wind has to be pretty calm, but it allows me a lot more maneuver room than trying to do it all inside on the kitchen table. This one was a proof shot made on Polaroid 664. The backdrop was my spare darkcloth draped over the charcoal grill. The sun was up high and behind the subject so I got a good amount of back lighting with sufficient fill in the foreground.
I don't do any of the lighting ratio calculations. I just simply set up the subject and move it and some simple reflectors around until I like setup.