There are many unspoken rules in the workplace.

If you’ve ever had a roommate or a sibling you’ve had to share a living space with, you may have learned the hard way not to push the boundaries of common courtesy too far. Similarly, there are many unspoken rules in the workplace as well — so pay attention and exercise civility to the people you have to spend most of your waking hours with.

Here are 12 tips to be courteous to your co-workers that you should, hopefully, already know.

1. Close the door if you’re having a meeting or if you’re on a conference call.

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