What is the best way to improve fuel efficiency on my Ford Galaxy?

I have a Ford Galaxy and I'm looking for ways to increase its fuel efficiency. Are there any modifications or maintenance that I can do to improve its gas mileage? I'm also open to any driving tips that can help me save on gas. Thank you.

Regularly check and replace your air filter to improve airflow and increase fuel efficiency.

Invest in low rolling resistance tires and keep them properly inflated to reduce fuel consumption.

Avoid aggressive driving and maintain a constant speed on the highway to save on gas.