Here's a kind of neat video tutorial for lighting "talking head" - type videos. And it's exactly the opposite of what we do when we light.
Us? We start with the back light. Then we fill underneath. That's the Mitchell Riggs way.
If there are any lights left we might hit the face with some, maybe get some kick light in the eyes.
Lastly make sure something fun is happening in the background. If you did it right it's probably that rim light you set up at the very beginning.
I know. It's just the opposite of what everyone else does.
Speaking of what everyone else does, here's David Ian Lee on Funny or Die. Spectacularly not safe for work.