Stop and go are MPG killers. Try to accelerate gently and anticipate so you can back off the throttle as soon as you know you'll be stopping. When paying attention you should be able to tell when more throttle is giving you little or no further benefit - try to stay just below that point. Fill up again and run the numbers (miles / gallons to full) to make sure your calculations are correct - fuel gauges are not always ultra reliable, even in a brand new vehicle so you might not be as bad as you think...
- R