How do I improve my fuel efficiency in my Volkswagen Touareg?

I've noticed that my fuel efficiency has been decreasing in my Volkswagen Touareg. Are there any tips or tricks to help improve my mileage? Any specific maintenance I should be doing? Thank you in advance!

Make sure your tires are properly inflated. Underinflated tires can decrease fuel efficiency. Check your owner's manual or the inside of your driver's side door for the recommended tire pressure.

Consider using a fuel injector cleaner. Over time, deposits can build up inside the fuel injectors, causing them to clog and decrease fuel efficiency. Using a cleaner can help remove these deposits and improve your mileage.

Avoid aggressive driving and excessive idling. Both of these habits can greatly decrease fuel efficiency. Try to maintain a steady speed and limit your idling time if possible.