What is the best way to improve fuel efficiency in the Nissan Juke?

I recently purchased a Nissan Juke and noticed that my gas mileage isn't as good as I expected. I want to save money on gas but also be more environmentally friendly. Any suggestions on how I can improve the fuel efficiency of my car?

Make sure your tires are properly inflated. Under-inflated tires can decrease fuel efficiency.

Avoid aggressive driving and rapid acceleration, as this can burn more fuel.

Consider using a fuel additive or cleaner to improve the performance of your engine.