A while back I had someone on another site ask me if I wouldn't mind putting together a tutorial of my basic figure light setup in DAZ Studio. I figured it was worth re-posting here (and maybe, if it proves popular, I'll do a G-rated version at some point in the future).
Lighting a full scene can be a little more complex, but it would just use an extension of these basic approaches. My technique comes from a variety of sources: looking at painters, critically analyzing TV and cinema lights, and from my time as a school portrait photographer.
While this tutorial is a couple of years old, my technique hasn't changed much. The main thing I usually do different now is use Distant Lights, instead of spots, and my main and rim lights are usually raytraced. But using spots and shadow maps can also yield fine results.
If you find this helpful, please let me know