Some people suggest a type of strong spray, I saw couple it with some common sense. Something bad can happen anywhere but if you do your best to use your head and avoid being alone in certain situations it will cover a lot of the problems. And if you end up choosing a spray type thing, at least practice being able to pull it out and aim it, I have known lots of girls that feel all good carrying it around, tucked in the bottom of their pocketbooks and they don't even know how to twist off the lock.