My original shot was not too bad though it is lacking in punch and vibrancy.
I created a new levels adjustment layer and filled the mask with 100% black; this effectively blocks out all changes to the adjustment. I then boosted the levels significantly and then using a white soft headed brush of 50px I painted into the mask revealing an overexposed face. I preferred to do the selection this way as it is easy to see the effect on the image and is easily corrected with a black brush. Once I had the right selection in the mask I then adjusted the levels to the correct value to produce a lightened face that is hopefully realistic.
The final section is about boosting the eyes. For this I repeated the levels adjustment on a new layer to boost the whiteness in the eyes. I have often seen this well over-cooked in cheaper magazines, almost looking like the eyes have been tipexed in, so I was careful to not over do this. Finally I repeated the selection and used a hue / saturation adjustment layer just to boost the saturation of the eyes slightly.
Overall this is a good improvement to the original image making the eyes much more piercing and drawing. It is possible on this blog to click on the first image to bring up a slide show moving between images with the cursor keys, it is easier to see the changes in this mode.