Classy

"Classy: Exceptional Advice for the Extremely Modern Lady" By Derek Blasberg.
I saw a few pages of this book here and it seems like it is really funny to read, but also has some good tips. Here is a description i found on amazon:

"If you’ve ever wondered how to climb the social ladder with grace, how to feel confident in every situation, or even how to make a lasting impression (but not the kind that lands you on the latest “Worst Dressed List”)—Derek Blasberg is here, with quotes and secrets from all the socialites so girls everywhere can learn how to have class. This hilarious handbook will provide everything you need to know about fashion, socialising, dating, and etiquette. With tons of practical tips and tools for learning to flaunt what you’ve got, dozens of specific how-tos, common no-nos, and huge blunders that even smart girls make, this tongue-in-cheek book will train you to be a lady, and not a tramp! "

You can buy it here