I like to party with Photoshop OOOOHHHHH!!! /facepet
so here's my 2 cents, all the advise you got is good I'm not sure what the limits are in elements 7 but i think you can use more blending on the skin tones ad some noise under filters and then a small amount of Gaussian blur [POW!].
Add some more dept to the eye's good way of doing this is to draw a skull on a new layer to help you figure out how the eye sits in the eye socket [BOOM!].
Now with a small size brush draw white highlights on the eyes lips and nose, use the apples on the lower right for reference [KAPLOW!] and to top it off try to stay away from using the burn tool a lot, natural colors always work best. if your using a photo to draw this image try putting it next to your drawing and constantly look back and forth at both images to help you figure out what you can do to fix little problems. [OH SNAP!]
I hope my little advice will help you, Ive been doing digital paintings for a long time now and I still love it! let me know if you have any questions.