If you're doing an "arranged" piece, such as real photographers do for real estate, this article gives good ideas.

http://www.flickr.com/groups/strobist/discuss/72157600081467414

I don't think any setup works universally.

Or if you're going for natural artificial (if I my be permitted to say that), I usually suggest that you look in the room for modeled lights and put Poser lights there. You have a big ceiling lamp in there. Any reason why you don't want to turn it on?

I use spot lights or point lights, depending on the situation.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)