Hi guys! This isn't really a how-to because I followed a tutorial myself. Hope this is the right place to post this in any cae.
So I recently bought the Bruce D. Mitchell mask tutorial from the Stan Winston School. http://goo.gl/MUCNI
It was a great lesson, and I highly recommend it to people who want to take mask-making to the next level. I have done a number of latex masks in the past but really loved these techniques.
Here are the videos of my progress in a playlist.