How to increase fuel efficiency in my Vauxhall Vivaro?

I have noticed that my Vauxhall Vivaro is consuming more fuel than usual, what are some tips to increase its fuel efficiency?

Properly inflate your tires and make sure they are aligned to reduce rolling resistance and improve fuel efficiency.

Avoid unnecessary idling and aggressive driving as it can greatly decrease your fuel efficiency.

Regularly change your air filter to improve engine performance and increase fuel efficiency.