Ask just about anyone you know and they will tell you the first day at a new job is like the first day of school. In addition to learning where you’ll work, where the bathrooms are and where the cafeteria is, you’ll meet people and you should be the person you want to be. I disagree with the metaphor.
If you’ve done your homework and kept in touch with your future supervisor during the transition, you know exactly what is expected of you on the first day. You know what the dress code is, what time to show up and if you are lucky if you need to bring a lunch or not.
As for meeting people, of course first impressions are important, but the people you meet will also want to give the best first impression. I suggest being relaxed and polite and yourself. Don’t try to be someone you aren’t, that approach never works out in the long run.
A successful first day at a new job takes a little planning. Set the alarm a few minutes early, or even a full half hour. Over dress a little. If everyone else in the office is dressed up for your first day, you do not want to be under dressed. Take a few extra moments before you walk out the door to remember that they hired you. You belong there. I don’t suggest being cocky, but simply confidant. When you arrive, be friendly. Make eye contact. Say hello and try to remember everyone’s names. You might be more successful than you thought!
Don’t be afraid to be lost or not know an answer. Ask for directions and ask for help. Everyone in the office has some knowledge that you need, even if it is only where the bathrooms are located.
Relax and above all else, be friendly. Soon you will know the ins and outs of the office. Until then enjoy the opportunities as they arise and use this as a chance to get to know everyone without any preconceived notions.