Check out these great Photoshop skills
http://i-love-photoshop.blogspot.com/2009/06/create-digital-makeup.html
Facial retouching
http://psd.tutsplus.com/tutorials/photo-effects-tutorials/quick-and-effective-facial-retouching/
Digital Nose Job
http://www.photoshopessentials.com/photo-editing/nose/