If you have a perimeter alarm system, leave it on for extra protection. Report any broken or flickering lights, dimly lit corridors, doors that don't lock properly, broken windows, or broken pay phones to maintenance and security. Don't advertise your social life or vacation plans and those of your co-workers to strangers visiting your place of work. Keep the emergency numbers for security, the police, and fire departments posted near every phone. It's also a good idea to write the address of the building on or near the phone.
People often forget addresses when reporting an emergency at work.
Post a list of employees who are trained in CPR or emergency first aid along with their extension numbers. If you are responsible for office keys, don't leave them on your desk or in the top drawer where they could be easily taken and copied. Keep them with you or hide them in a secure place. Only give out keys to persons who have legitimate need and make sure they are returned. Never write down safe or vault combinations or computer passwords.