Another safety idea: police departments usually offer a free service where an officer will come to your home and look at your existing security system (or lack thereof). They will make suggestions on how to keep your home more secure as well as your personal safety. These are often low or no-cost things like cutting back overgrown shrubbery or showing you how to properly secure a glass sliding door. If you are concerned about being followed, ask them to check if a GPS has been put on your car.

They may have a service where they will drive by and check your house (viewing from their vehicle on the street) if you give them a specific range of dates, what make/model of vehicles are on the property, and if anyone else is permitted on the premises. I've done this while on vacation and requested it by calling their non-emergency number. Ask your local law enforcement if drive by safety checks can be done.

Lastly, look in your back seat and underneath your car before entering it. I've heard pepper spray is effective for sel-defense and you can put it on your keychain. You want your keys in hand in a parking lot. Don't get distracted fumbling through a bag for car keys or talk on your cell phone. Do keep your phone on and nearby. Keep your whereabouts about you, so to speak. Take care.