Yup. Accelerate gradually, drive the speed limit, drive 55 mph with the cruise control on the highway, don't roll down the windows or use air conditioning, and avoid idling your car. Driving habits will be the biggest thing that affects your mileage.
Keep up with standard maintenance.
Do mods like lowering, narrower tires, chips, intake, headers, exhaust, synthetic lubricants, wheel well covers, and lighten as much as possible.
