How to maintain the fuel efficiency of my Volkswagen Tiguan?

I have noticed that the fuel efficiency of my Volkswagen Tiguan has been decreasing lately. What are some tips and tricks to keep it at its best?

Regularly check and replace your air filter. A dirty air filter can significantly decrease your car's fuel efficiency.

Properly inflate your tires. Underinflated tires can cause your car to use more fuel.

Avoid idling your car for too long. Turn off your engine if you are going to be stopped for more than a minute.

Try to drive at a consistent speed. Speeding up and slowing down frequently can use more fuel.

Avoid carrying unnecessary weight in your car. The heavier your car, the more fuel it will use.