What is the best way to improve fuel efficiency in my Vauxhall Zafira Life?

I have noticed that my Vauxhall Zafira Life is not as fuel efficient as it used to be. What steps can I take to improve its fuel efficiency? Are there any specific maintenance tasks I should be doing?

Regularly checking and replacing your air filter can greatly improve your fuel efficiency. It is recommended to replace your air filter every 12,000 miles or as specified in your vehicle's manual.

Keeping your tires properly inflated can also help improve fuel efficiency. Check your tire pressure regularly and make sure they are inflated to the recommended level.

If you have not done so recently, consider getting a tune-up for your vehicle. This can help improve its overall performance, including fuel efficiency.