Manners will get you far, my friend. If someone speaks to you, then respond with a smile and answer them politely. If you share a cubicle, then speak to your coworker when you come in. If someone asks you to do something, smile and say that you'll be happy to.
Listen to what others are talking about when they chat with one another. That will give you a sense of what their interests are.
Never repeat gossip. It will kill you quicker than you would think, being as you're a new person to the company. You want to be a part of the company - you're not there to cause dissention in the ranks. Good luck.