How to be Prettier: No going on a job interview without a French manicure, your hair away from your face, and eyebrows that were recently done.
How to be (less) Awkward: Please don't ask where the "little ladies room" is. You're not five. "Where is the closest restroom?" is the phase to say. And never say it at the table--it is not polite conversation. Say "excuse me," get up, and ask the hostess or a wandering waiter where to go.