How do I improve fuel economy in my Vauxhall Insignia?

I recently bought a Vauxhall Insignia and I am looking for ways to improve its fuel economy. Any tips or tricks that I should know about?

Regularly check your tire pressure and make sure they are properly inflated. This can greatly improve fuel efficiency.

Avoid aggressive driving and try to maintain a constant speed while on the highway. Sudden accelerations and braking can lead to increased fuel consumption.

Consider reducing the weight in your car by removing unnecessary items from the trunk or back seat.