I used my recent self portrait to make a little tutorial for you guys. I hope you use it to paint some portraits! If so, please give me a link to your work, I'd love to see it.
There's some additional material on my blog, where I analyzed skin tones from various Deviantart stock photos. kmcmorris.blogspot.com/2015/11…
Most of what I learned about skin tones came from Navate's excellent skin tone tutorials. Check them out: fav.me/d2dwqgc