How can I improve the fuel consumption of my Vauxhall Insignia?

I recently purchased a Vauxhall Insignia and have been noticing that the fuel consumption is quite high. Are there any tips or tricks to improve the fuel efficiency of my car?

One way to improve fuel consumption is to maintain proper tire pressure. Under-inflated tires can decrease fuel efficiency.

Another tip is to avoid aggressive driving and accelerating quickly. This can use up more fuel.

Regularly servicing your car, such as changing the air filter, can also help improve fuel efficiency.