The most powerful women in the world know success — and how to get there. They’re heading up companies, carving out names for themselves in their respective industries — and some are doing so well that they only need to go by their first name. These are just a few of the women who should be running the world. But, please. They’re too busy for that. That being said, they do have time to dole out some brilliant career advice. Take it, won’t you?