Adjusting the nut behind the wheel = you, the driver
Another key to getting great results is modifying your driving style, and monitoring your progress with a fuel economy gauge. Get yourself a ScanGauge or Ultragauge - they make a world of difference from the instant & resettable trip feedback. Also they're a way to measure the impact your mods are having (or not).
Sounds like you're ready for a fun project.