What is the most efficient way to improve fuel efficiency on a Ford Puma?

I recently purchased a Ford Puma and I am looking for ways to improve its fuel efficiency. Are there any specific modifications or maintenance tips that I should follow to get the best mileage out of my car?

Regularly check and replace your air filter, as a dirty filter can decrease fuel efficiency by up to 10%

Keep your tires properly inflated, as underinflated tires can decrease gas mileage by 0.2% for every 1 psi drop

Avoid idling and take advantage of cruise control on long drives to maintain a consistent speed