Some more things that help you a lot

1. Pay attention to visitors.
You never know who they are.

2. Stay away from big fights and gossip.
I can't speak for all offices, but in Interbrand the employees are highly encouraged to get along. That's why it's a good idea to stay away from gossip and rumors. It's a small world, you never know who's going to hear it next.

3.Be helpful
It doesn't mean you should become a slave and do things you're not supposed to do, but if you see someone too busy to get lunch from a local shop and you're going anyway, it won't hurt you. Don't make it a habit, though. People get used to things easily.

4.Be on time EVERY day. Period.

5.Don't forget to have fun.
There are people who do and they're not a pretty sight.