Corporate warfare and office survival tips for rank and file personnel?

I will soon be once again entering an office environment, joining a standard team of 10–15 people +1 to 2 team leaders. I will be required to work there at least a year after my training period, and that is why I need your advice regarding long-term office relations.

Those of you who work an 9–5 office job I would like to ask whether you have any tips for “office survival” i.e. how to avoid conflicts in the workplace, avoid making enemies, etc. What do you do to keep good relations with your coworkers? What are the things, that other people do, that annoy you in your workplace? Is it possible to please everyone? What do you (not) do to make your work experience a content, if not a happy one?

The reason I am asking is though generally I have ok realtions with people at work, I also tend to quickly gain a few really good enemies. This particular position will be relatively long term, so I am looking to better understand office group dynamics, to minimize the damage (and perhaps be less of a pain in the a** to the rest of my new team) ;-)

Cheers!

the fremen