A couple that helped me out were maclean's tutorial:

digilander.libero.it/maclean/DStutorial.htm

And Questor's:

questor.oldwolves.co.uk/tipsntricks/studio/studio01.htm

I find Questor's lighting models to be overkill  -- (I use a simple setup of two spotlights and one distant for most stuff) but needs differ -- I'm not doing many closeups or ultra-realistic renders.

You may also want this:

www.rubicondigital.110mb.com/Code/DSRenders.html

It's a tutorial designed to help you get faster renders which, as you start adding lights, you're gonna find REALLY helpful.

Good luck!