What is the most effective way to increase the fuel efficiency of my Vauxhall Astra?

I've been noticing that my Vauxhall Astra has been consuming more fuel than usual. Is there anything that I can do to improve its fuel efficiency?

Regularly servicing your car can help improve its fuel efficiency. Make sure to follow the maintenance schedule specific to your Vauxhall Astra.

Check your tire pressure regularly as underinflated tires can decrease the fuel efficiency of your car.

Changing your driving habits can also make a significant impact on your car's fuel efficiency. Avoid unnecessary idling, use cruise control on highways, and try to maintain a steady speed whenever possible.