How to improve fuel efficiency in Vauxhall Movano?

I have a Vauxhall Movano and I have noticed that its fuel efficiency is not as good as it used to be. What can I do to improve it?

Regularly check and maintain your tire pressure. Properly inflated tires can greatly improve your fuel efficiency.

Avoid aggressive driving. Smooth acceleration and braking can help you save fuel.

Make sure your engine is properly tuned up and your air filter is clean. This can greatly improve your fuel efficiency.