Photographer duo Joachim Guanzon and Marden Blake (AKA aesonica) created this short behind-the-scenes video showing how they recently shot and Photoshopped an Audi A4 photo for a print advertisement. You can read a longer how-to over on the aesonica website:
The goal is to make it look as if you had 20+ lights, grids, flags and reflectors to shoot your project. There is nothing better than hearing someone ask how many lights were needed to create your shot and revealing that you used only one. The trick is by doing something that could realistically be done with enough equipment and lighting skill, with only one light.
On the other hand, if you get too carried away, there is nothing worse than someone asking if you used Photomatix to compile your HDR garbage shot followed by “My 13 year-old has that program too!”