After hours: Don't work late alone. Create a buddy system for walking to parking lots or public transportation or ask security to escort you.
Elevators: Don't get into elevators with people who look out of place or behave in a strange or threatening manner. If you find yourself in an elevator with someone who makes you nervous, get off as soon as possible.
Parking lots or garages: Choose a well-lighted, well-guarded parking garage. Always lock your car and roll the windows up all the way. If you notice any strangers hanging around the parking lot, notify security or the police. When you approach your car, have the key ready. Check the floor and front and back seats before getting in. Lock your car as soon as you get in - before you buckle your seat belt.
Reception area: Is the receptionist equipped with a panic button for emergencies, a camera with a monitor at another employee's desk, and a lock on the front door that can be controlled?
Restrooms: Attackers can hide in stalls and corners. Make sure restrooms are locked and only employees have keys. Be extra cautious when using restrooms that are isolated or poorly lighted.
Stairwells and out-of-the-way corridors: Don't use the stairs alone. Talk to the building manager about improving poorly lighted corridors and stairways.