What is the best way to maintain the Nissan Navara's fuel efficiency?

I recently purchased a Nissan Navara and I want to make sure I am taking proper care of it. What are some tips for maintaining its fuel efficiency and ensuring it runs smoothly? Any advice is greatly appreciated!

Regularly check and replace your air filter. A dirty air filter can greatly affect fuel efficiency.

Keep your tires properly inflated. Under-inflated tires can cause your car to use more fuel.