What is the best way to improve gas mileage in a Nissan Micra?

I recently purchased a Nissan Micra and I'm looking for ways to improve its gas mileage. I'm hoping to save some money on gas and help out the environment. Any advice would be appreciated!

One way to improve gas mileage is to make sure your tires are properly inflated. Underinflated tires can decrease mileage by up to 3%, so check your tire pressure regularly.