What is the most efficient way to improve fuel economy in the Audi A3?

I want to optimize my Audi A3's fuel consumption. What steps should I take to achieve maximum fuel efficiency?

Keep your tires properly inflated to reduce rolling resistance and improve fuel efficiency. Also, avoid heavy loads and excessive idling to maintain good fuel economy.

Regularly tune up your Audi A3 to ensure the engine is running at peak performance and using fuel efficiently. You should also use the recommended oil and fuel grades for your vehicle.