Don't overdo
On your very first day don't go in with an "all-or-nothing" approach in making your mark right away. Study how things are done if you want to make a meaningful contribution. Once you feel how it works then give your boss some ideas for improvement.
Take Initiatives
Spend your first month meeting your new co-workers and know their jobs. Don't feel bad if you feel people aren't paying attention to you as preferring to stay cooped in your cubicle has problems of its own.
Understand Company Culture
Pay attention to what everyone else is doing. Are people sending text messages during a business meeting. Are they posting to Facebook, using email or instant messages? If so there is nothing wrong if you follow them doing it from your desk. Watch if they are using laptops during meetings or listening to iPod while working. Every workplace is different and needs to be properly understood.
First Meeting
It takes just a quick glance for someone to evaluate you while meeting for the first time. The other person forms an opinion about you based on your appearance, your body language, your demeanor, your mannerisms, and how you are dressed. Be careful about the first time meeting as the others are watching you how you act and behave. If you don't have much work to do don't go on a long lunch breaks. And when it is time to leave office never be the first to be out of the door nor the last.
Understand Your Boss
Try and find out what your boss wants and understanding you boss could take a couple of months. Interact with manager on a regular basis so as to understand clearly how he feels about the way you work and if he knows how you will help. Your boss may not like to communicate the same way you do and it's important for you to match your boss's preferences.
Take Advice
You'll need advice from more than one source if you intend to build a strong career and for that your boss is great source of help. Look for people who could act as sounding boards to help you progress and develop in the organization.
Stepping Stone
Your job can provide opportunity to gain new skills, learn about the business world and in making valuable professional networking contacts. Enjoy the time and learn as much as possible because you won't have that time forever.