From my perspective, I think mastering the art of conversation is one of the most important skills to develop. How to Talk to Anyone is a great book to help. You have to build rapport with surly creatives and clients that you may not see all that often. They will invite you into their inner circle if they trust you, find you interesting and want to talk to you. It doesn't matter how smart you are if you haven't got that.
Heather LeFevre is Senior International Planner at DDB Amsterdam