Welcome.
The usual wipe-your-feet-at-the-door stuff:
65 proven mods
Hypermiling tips
When you first get started, the biggest bang for the buck - because no bucks are actually spent - is from "adjusting the nut behind the wheel." Now that you are actually thinking about driving in such a way as to maximize your fuel economy, you will see opportunities that weren't realized as opportunities before. They weren't opportunities because there were no goals to associate them with; now there are and you can see them.
Schedule pretty reliable? Leave five minutes earlier, drive five miles per hour slower, save five miles per gallon. Your mileage, as they say, may vary.
Long downhills on modest routes? Shift to neutral and roll. Stop sign at the top of a hill? Coast to it.
One thing that appears to be a common trait among hypermilers is that our brakes tend to last a long time. Having built up that kinetic energy by burning fuel, we're loath to throw it away as waste heat in the brakes.
Another Civic in the garage!