Do what you want to do in life, not what your parents want you to do (should have done this when I was in college).
Wear sunscreen. Every day. You don't want to see wrinkles at the age of 25-30.
Take responsibility for your own mistakes.
Learn how to write and speak correctly. People will notice if you dont- especially employers.
Don't spend more than you earn. You may want to go crazy at Neiman Marcus, but keep an eye on the wallet. That being said, if you DO go crazy there, start with Miu Miu shoes. They are the most comfortable of all designer shoes.