Hello, I'm having trouble fixing the skin tone on this picture and I have tried to follow this tutorial (http://retouchpro.com/tutorials/index.php?m=show&id=144) but I got lost where it says "Make a new Hue / Saturation adjustment layer and set Saturation to 50..." and as you can tell, I'm a newbie and would appreciate if someone can correct the skin tone for me. Thanks

Please go here for a full size photo.

You can use some quick tips

First zoom image, use Lasso tool and choose the skin
Image>Adjustment>Hue&Saturation
Edit>Reds
Desaturate -27

use Lasso tool and choose Teeth
Image>Adjustment>Hue&Saturation
Edit>Yellows
Desaturate -40 (for example)

Choose Doodge tools (Highlights, 50%) and paint eye balls