I've been working on fuel mileage on most of the cars i've had since back in 1997, and while nothing too exotic, i've been able to get better expected.
I usually have cruise control on my cars, so keeping constant speeds are easier. The one car I got the best mileage on was my 1990 Cavalier Z24. This was a 3.1L V6 and 5sp manual. I got 34.85MPG on a big trip from the F1 race in Montreal to Newark, NJ. I think the thing that helped me the most was the Vacuum/Boost gauge. I found i was able to hold speeds at 2in/hg or 10in/hg, but obviously was able to get better mileages at the higher vacuum, so I started getting the eye/foot coordination down to a science
Welcome to GS! I see you have one of the Saturn Coupes with the sedan noses. I like those better than the "swoop down" noses that were in the original design. Lot's of Saturn owners here, so they'll be lots to glean. But a 1994 might make you ineligible for a scangauge, .