Clear Desk Policies - a keystone of physical security!
Not just a way to please the corporate overlords with a sleek tidy work environment suited for hot-desking but it is a great idea from the perspective of information security. Don't leave any sensitive information that you don't want the cleaners reading out at the end of the day. Lock your desk cabinets and secure your laptop both physically and logically by locking it everytime you leave your desk. The lack of clutter will also help you focus on important tasks by clearing away peripheral distractions!