How do I maintain my Toyota Yaris for better fuel efficiency?

I have been noticing that my Toyota Yaris is not giving me the fuel efficiency that it used to. What steps can I take to maintain my car and improve its fuel efficiency? Any tips or suggestions would be greatly appreciated.

Regularly check and change your air filter to improve engine performance and fuel efficiency. Also, make sure your tires are properly inflated and aligned.

Another important factor is to use the right kind of fuel and to keep your car well-maintained through timely servicing. This can greatly impact your car's fuel efficiency.

In addition to these steps, try to avoid driving at high speeds and accelerate and brake gradually. This can also help in improving your car's fuel efficiency.