Office etiquette requires that individuals maintain a certain level of cleanliness in the office. There are many shared areas in the office and it is important that all of them remain clean and safe for everyone that uses them. This concept may be simple to understand when it comes to very public spaces but can be questioned by some when it comes to other more personal space.
The break room may be the most important space to be kept clean. No workers should use the sink as a dumping space like they may at home. Dishes should be washed and never left in the sink. Best intentions to return right back to the kitchen to clean your mess, may turn out to be the end of the day.
The entry area and hallways are probably the easiest to keep clean and clear with the exception of rainy days. On rainy days many people enter the office with umbrellas. Never leave your umbrella open by the door. If an office of fifty people all left their umbrellas open at the door there would be no way to enter most buildings. If you are moving items in and out of the office try not to stage items in front of the door for too long a period of time.
The most controversial space would be your personal cubical. It is important that this be your personal space but it should also be important to maintain a clean and clear workspace so as not to add to the clutter of an office. The line is not solid here and every office may have different rules, so be sure to stay in line with your offices rules.