1. Mount the GPS securely. This will help to prevent it from falling and breaking, and it will also make it easier for you to see the screen while you're driving.
2. Use a power source. Handheld GPS units typically run on batteries, so you'll need to make sure that you have a power source available in your car. Most GPS units come with a car charger, or you can use a USB cable to connect the GPS to your car's USB port.
3. Keep the GPS updated. This will ensure that you have the most accurate and up-to-date navigation information. You can typically update your GPS by connecting it to a computer and downloading the latest software from the manufacturer's website.
4. Familiarize yourself with the GPS. Before you start using your GPS in the car, take some time to familiarize yourself with its features and how to use them. This will help you to use the GPS safely and effectively while you're driving.
5. Avoid using the GPS while driving in hazardous conditions. If the weather is bad or the roads are icy, it's best to avoid using your GPS while you're driving. This will help you to focus on the road and stay safe.
By following these tips, you can safely and effectively use a portable handheld GPS in your car.