What is the best way to increase the fuel efficiency of a Toyota Highlander?

I have been noticing that my Toyota Highlander's fuel efficiency is not as good as it used to be. What steps can I take to improve it?

Regularly check your tire pressure and make sure they are properly inflated. This can greatly improve your fuel efficiency.

Avoid idling for long periods of time. Idling uses up unnecessary fuel and can decrease your overall fuel efficiency.

Consider installing a cold air intake system. This can help increase your engine's power and improve fuel efficiency.

Try to maintain a consistent speed while driving. Sudden acceleration and deceleration can decrease fuel efficiency.

Use cruise control on the highway. This will help maintain a consistent speed and improve your fuel efficiency.