3. Turn it over
Your car is always using power to some extent. Even when it is parked on the driveway, the sensors for your alarm are still active and power is still leaking from your car’s battery. You can overcome this by turning it over and letting it run for 10 or 15 minutes once every week or so, which will lubricate the engine and allow the battery to regain some power from the alternator.
Obviously, we don’t encourage any needless journeys and we certainly recommend you do not leave your car unattended while idling.