Talk to the building manager about improving poorly lighted corridors and stairways. When you are in 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. When you are in rest rooms.
Attackers can hide in stalls and corners.
Make sure rest rooms are locked and only employees have keys. Be extra cautious when using rest rooms that are isolated or poorly lighted. Don't work late alone . Create a buddy system for walking to parking lots or public transportation or ask security to escort you. When you are in parking lots or garages.