What is the best way to maintain the fuel efficiency of my Audi A2?

I recently purchased an Audi A2 and want to make sure that I am maintaining its fuel efficiency. What are some tips and tricks for keeping my car's fuel consumption low?

Regularly check and replace your car's air filter. A dirty air filter can increase fuel consumption.

Avoid aggressive driving and rapid acceleration as it can significantly impact fuel efficiency.

Keep your tires properly inflated. Underinflated tires can decrease fuel economy.