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

I recently purchased a Toyota Yaris and I want to make sure I am getting the best fuel efficiency possible. What are some tips that I can follow to improve my car's fuel efficiency?

Regularly check and replace your car's air filter to ensure proper air flow, which can improve fuel efficiency.

Avoid idling for extended periods of time and try to combine errands to reduce the amount of starts and stops.

Make sure your wheels are properly aligned and inflated - this can greatly impact your car's fuel economy.

Try to reduce the weight of your car by clearing out any unnecessary items in your trunk or backseat.