What is the best way to increase the fuel efficiency of a Ford Focus?

I have a Ford Focus and am always looking for ways to save on gas. Any suggestions for how I can improve my car's fuel efficiency?

Regular maintenance, such as changing your air filter and spark plugs, can help improve fuel efficiency.

Try using cruise control while driving on the highway. It can help you maintain a steady speed and save on gas.

Avoid idling for extended periods of time. It wastes gas and contributes to pollution.