How can I improve fuel economy in my Audi A6?

I recently purchased an Audi A6 and I love everything about it, except for the gas mileage. What steps can I take to improve the fuel efficiency without sacrificing performance?

Regular maintenance, such as oil changes and air filter replacements, can improve your fuel economy.

Check your tire pressure regularly and make sure they are properly inflated. Under-inflated tires can decrease gas mileage.

Avoid using the A/C as much as possible, as it can significantly reduce fuel efficiency. Use the fan or roll down the windows instead.