How to increase fuel efficiency in a Vauxhall Corsa?

I have been noticing that my Vauxhall Corsa is consuming more fuel than usual. What steps can I take to improve its fuel efficiency?

Make sure your tires are properly inflated. Under-inflated tires can cause your car to use more fuel.

Avoid speeding and aggressive driving. These habits can decrease your fuel efficiency by up to 33%.

Regularly check and replace your air filter. A clogged filter can decrease your fuel efficiency by up to 10%.

Avoid idling. Idling for more than 10 seconds wastes more fuel than restarting your car.