How to improve the fuel efficiency of Vauxhall Corsa?

I have been using my Vauxhall Corsa for a few years now and I have noticed that it is not as fuel efficient as it used to be. What can I do to improve its fuel efficiency? Are there any specific tips or maintenance tasks that I should be aware of?

Avoid aggressive driving and heavy acceleration. This can increase fuel consumption by up to 40%. Drive more smoothly and maintain a constant speed whenever possible.

Regularly service your car. A well-maintained engine can significantly improve fuel efficiency. Make sure to follow the manufacturer's recommended service schedule.

Regularly check and replace your air filter. A dirty air filter can decrease your car's fuel efficiency by up to 10%. Make sure to replace it every 15,000 to 30,000 miles.

Check and maintain proper tire pressure. Under-inflated tires can decrease your car's fuel efficiency by up to 3%. Make sure to check your tire pressure at least once a month.