To help other drivers see you better, especially when the sun is on the horizon behind you, you should:

Turning your headlights on is essential for improving visibility when driving, especially during low-light conditions such as sunrise or sunset. When the sun is low on the horizon, it can create glare that makes it difficult for other drivers to see your vehicle. By turning on your headlights, you enhance your vehicle's visibility, allowing other drivers to see you more clearly, regardless of the direction of the sun.

This practice is also a vital safety measure, as it helps to communicate your presence on the road to other motorists, especially when you might otherwise blend into the background due to the lighting conditions. Most vehicles have daytime running lights or automatic headlights for this reason, as they are designed to stay visible at all times.

In scenarios where other options like honking the horn, pulling over, or turning off headlights may not effectively improve visibility or safety, using headlights becomes the most reliable choice for ensuring that your vehicle is seen by others on the road.