When discussing personal security, the overriding message taught by security experts is to develop and then practice situational awareness. Simply put, situational awareness is paying attention to your surroundings and nearby activity in order to be aware of and thus avoid potential danger.
Imagine you’re having a meal at a restaurant. If a fire were to break out, do you know where the nearest exit is located? Situational awareness calls for you to locate the closest exit as you choose your seat and then mentally plot the fastest route to it from your seat. Or imagine you’re walking down the street late at night, when you see a group of rambunctious teenagers coming in your direction, kicking garbage cans and yelling at passing cars. Is there someplace, such as a store, where you can duck inside while they pass? Can you safely cross the street to avoid coming into close proximity? If the answer to these is no, you might consider turning around and retracing your steps. Avoiding questionable scenarios is the most effective way to remain safe.