Lately, I have been working on portrait painting, working from photos.
A great book called Painting beautiful skin tones with color and light, by Chris Saper had lots of good advise. Here are some recent portraits.

A friend recently passed on a web link for those who interested in learning how to do portrait painting. Check it out at http://www.portrait-artist.org/face/index.html

Another link she passed on does a great job explaining colour theory http://www.worqx.com/color/index.htm . Thanks Amanda!