desks or (dare I even say it) lunches without permission.
* Do clean up your messes, be it in the kitchen or at the copier, don't expect others to clean up after you.
* Don't gossip. Over-sharing about your own personal life should also be avoided.
* Do be on time to meetings, conference calls, and appointments.
* Don't sink to someone else's standards. Just because coworkers behave badly is not a reason for you to follow suit. Always keep your poise and do the right thing, even if you're doing it alone. It matters and will be noticed.
If a coworker's behavior is infringing upon your ability to perform your job well, address it directly with the individual.
Clearly state how their behavior is impacting you, and, perhaps, others. Kindly request a change of behavior emphasizing how everyone could benefit from it. If the problem persists and is truly more than a mere annoyance, then bring it to the attention of your supervisor.
On the other hand, if a change happens, by all means be sure to say "thank you."