What is the best way to maintain my Toyota Highlander's fuel efficiency?

I have noticed that my Toyota Highlander's fuel efficiency has been decreasing. What steps can I take to improve and maintain its fuel efficiency?

Regularly servicing your Toyota Highlander according to the manufacturer's recommendations can help improve and maintain its fuel efficiency.

Maintaining proper tire pressure can also make a difference in fuel efficiency. Check your tire pressure regularly and make sure they are inflated to the recommended level.

Avoid idling for long periods of time and try to combine errands to reduce the amount of driving you do. This can also help improve fuel efficiency.