How do I increase the fuel efficiency of my Ford Mondeo?

I recently bought a used Ford Mondeo and have noticed that it's not getting the best gas mileage. What are some tips or tricks I can use to improve its fuel efficiency?

Don't forget to check your tire pressure regularly! Underinflated tires can decrease fuel efficiency and increase the risk of tire blowouts.

One easy way to increase fuel efficiency is to regularly maintain and replace your air filter. A dirty or clogged air filter can decrease fuel efficiency by up to 10%.

Another helpful tip is to avoid using cruise control on hilly terrain, as it may cause your car to downshift more frequently and use more fuel. Instead, try using your own judgement to maintain a steady speed.