Be careful to not get lazy and hold the reflector low... unless the flashlight under the chin effect is what you are looking for... you can create what I call "spooky light" that way.
Spot meter, spot meter, spot meter. You can create some great stuff with just a reflector and the right placement...
This was shot with the subject standing in the shade of the house behind her (front door is open, with all the lights off inside). Only the top of her head is being illuminated by the sun behind her... a silver/gold reflector is being held in the sunlight, bouncing it directly back on her. Spot metered to not blow out the white shirt... on an Auto setting like Av, the shirt would be gray and the rest overexposed...
