How do I increase the fuel efficiency of my Vauxhall Astra?

I have been noticing that my Vauxhall Astra's fuel consumption has been increasing lately. Are there any tips or tricks I can use to improve its fuel efficiency?

Regularly check and replace your air filter to ensure proper air flow into the engine. This can greatly improve fuel efficiency.

Maintaining proper tire pressure can also have a significant impact on fuel efficiency. Make sure to check your tires regularly.

Avoid aggressive driving habits, such as accelerating quickly and braking sharply. This can greatly decrease your fuel efficiency.