How can I optimize the fuel efficiency on my Audi A3?

I have noticed that my Audi A3 is consuming more fuel than it should be. What are some tips and tricks I can use to improve its fuel efficiency?

Start by checking and replacing your air filter regularly. A dirty air filter can reduce fuel efficiency by up to 10%. Also, make sure your tires are properly inflated as under-inflated tires can also decrease fuel efficiency. -John

Avoid idling your car for extended periods of time. Not only is it harmful for the environment, but it also wastes fuel. It is better to turn off your engine if you will be stopped for more than 30 seconds. -Emily