- Making sure you have enough liquids, like the other answer said
- Exercising outside only in appropriate weather
- Exercising outside only in daylight hours
- Having your phone with you in case you need to call for help if you become injured or abducted
- Making sure that you stretch before and after to improve performance and to decrease the likelihood of injury
- Possibly having a personal alarm
- Trained in a martial art or hand-to-hand combat
- Having proper clothing and shoes
- NOT wearing earbuds that impair your awareness of your surroundings
These are just a few that I thought of :)