What is the best way to maintain the Vauxhall Combo Life's fuel efficiency?

I've recently purchased a Vauxhall Combo Life and I want to make sure I'm getting the most out of its fuel efficiency. What steps can I take to ensure the best mileage possible?

Regularly check and replace air filters to ensure the engine is getting enough air for proper combustion. This can greatly affect fuel efficiency.

Make sure your tires are properly inflated - underinflated tires can increase fuel consumption by 3-4%. Also, make sure your tires are aligned and balanced to reduce any unnecessary drag while driving.

Avoid aggressive driving and excessive idling as both can greatly affect fuel efficiency. Drive at a steady pace, avoid sudden accelerations and decelerations, and turn off your engine when parked for extended periods of time.