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

I recently bought a Ford Puma and I love everything about it except for the fuel consumption. Is there anything I could do to increase the fuel efficiency?

One way to increase the fuel efficiency of your Ford Puma is to properly inflate your tires. Under-inflated tires can decrease your gas mileage by up to 3%

Avoid aggressive driving and try to maintain a constant speed while on the road. Sudden acceleration and braking can use up more fuel than necessary.