How do I improve my fuel efficiency on my Vauxhall Movano?

I recently purchased a Vauxhall Movano and I am looking for ways to improve my fuel efficiency. What are some tips and tricks I can use to reduce my overall fuel consumption?

Install a fuel efficient air filter to improve engine performance

Regularly check and replace spark plugs for optimal fuel combustion

Avoid accelerating too quickly and maintain a steady speed on the highway