How can I improve my Kia Ceed's fuel efficiency?

I recently bought a Kia Ceed and I've noticed that it's using a lot more fuel than expected. Are there any specific tips or tricks I can use to improve its fuel efficiency?

Regularly check and replace your air filter to improve gas mileage.

Avoid idling for long periods of time and try to combine errands to reduce unnecessary trips.

Ensure your tires are properly inflated as under-inflated tires can decrease fuel efficiency.