Download the eyelash brushes from Deviant art just type in eyelash abr - or get these ones https://gumroad.com/l/30PsBrAbs

Learn how to paint white eyes and tears
Change a backdrop using several textures and dodge and burn
Learn how to use ACR for radial fill and color toning
Learn how to enlarge facial features and use warp and liquify
Learn how to apply texture to skin to make it appear cracked
Draw on eyelashes and eyebrows
Do smudge painting on skin
Apply oil filter to hair and skin