I'm always in search of good fashion lighting tutorials and came upon this site for basic portrait lighting. It's quite informative and have photos + descriptions of setups. What's great about it is they'll tell you the setup and show you photo comparisons of before and after of different setups. Make sure you check out the equipment lessons section as well as it includes alot of lighting tutorials as well. Enjoy!
http://www.photoflexlightingschool.com/index.html