How can I improve fuel efficiency in my Toyota Camry?

I've noticed that my Toyota Camry's fuel efficiency isn't as good as it used to be. Are there any simple maintenance tasks I can do to improve it?

Make sure to regularly check and replace your air filter. A dirty air filter can significantly decrease fuel efficiency.

Properly inflate your tires. Under-inflated tires can cause your car to use more fuel.

Avoid accelerating too quickly and maintain a steady speed while driving. Sudden stops and starts can waste fuel.