Anything revealing questionable humor

If a joke or video is too offensive to share in the office, it's definitely not a good idea to store it on your work computer.

"More and more companies are concerned about legal issues related to workplace sexual harassment and discrimination, so any humor that might be deemed offensive could land you in hot water," Kerr said. "Even just saving offensive emails that contain racial or sexual humor has, in some cases, been used to justify disciplinary action with some employees."