The best way to rise to the top of any potential employer's short list of job candidates is to be excellent.
All excellent candidates share three general characteristics.
First, they're pleasant. If you're so painfully shy that you can't occasionally look the interviewer in the eye, or if you're so intense you sprain the interviewer's hand when you shake it, you'll be considered eccentric, not excellent, and you'll be cut from consideration. Second, they make a good appearance. They don't wear flip-flops or shorts on job interviews and they don't expose their navels, cleavage or chest hair. Third, they are appropriately credentialed.