How can I improve my Ford Focus's fuel efficiency?

I have been noticing that my Ford Focus's fuel consumption has been higher than usual. What can I do to improve its fuel efficiency?

One way to improve fuel efficiency is to regularly check and replace air filters. A clogged air filter can decrease your car's efficiency.

Try changing your driving habits. Avoid rapid acceleration and braking, and maintain a consistent speed. This can help improve your car's fuel efficiency.

Check your tire pressure regularly. Underinflated tires can decrease fuel efficiency. Make sure to inflate your tires to the recommended pressure.