Here's a fun Saturday morning activity for you - try your hand at lighting a virtual model in this Virtual Lighting Studio. It's pretty simple, and very addicting. For each light, you'll choose the source - a bare strobe, softbox, or ringlight. Then just decide the power, gel colors, placement and distance. Maybe for the next version the virtual model won't be so creepy. I agree with David Hobby's sentiment - "On the one hand, I just blew 20 mins playing with this thing. On the other, pretty sure this guy is gonna kill me in my dreams tonight."
For the above image, I used a ring light straight on with two bare bulbs on either side. What can you come up with?