Couple of ideas to help increase gas mileage. The first one works for any vehicle. The second one will probably only work for newer vehicles if at all. It's worth trying if you've got fuel injection. I'm managing to get about 120% of EPA mileage with them.

Anticipate stop lights/signs, etc. Let the vehicle coast to a stop as much as possible. The brake pedal cost gas & maintenance.

Turn off the engine instead of idling for any length of time.