On the topic of alterations (well kind of) how about some facial alterations - makeup only of course - a great guide on how to highlight and contour. My recommendation (particularly if you have cool colouring) is not to use bronzer (which in my experience only works on warm skins) but to use a powder (same sort of powder you use to stop the shine) in a shade darker for a more natural look.
Plus a great find from the lovely Lisa White if you are interested in vintage fashion it's a must watch.
And some reading to give you assistance or inspire you - Ms MakeItOver Bernadette recommends the last one - How to Get Dressed: A Costume Designer's Secrets for Making Your Clothes Look, Fit, and Feel Amazing