When you walk into your first job as an MBA, whether it's as a seasonal associate or as a full-time employee, all eyes will be on you. Here, corner-office types reveal a portfolio of secrets for brandishing the confidence, wisdom, and polish of someone who has worked at the company for three years-even when you've only been there three weeks. Secret number one: The thing nobody tells you about the honeymoon period is that there is no honeymoon period.

If you want admissions officers hanging on your every word rather than sneak-checking their watches, take a look at this Jungle guide.