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Well, there are a number of assumptions I have to make given that you don't break 40 with the exact same car I drive (is yours a 5speed?) I'm going to guess probably. It's all in technique, I've found. I'm looking for more mileage myself, so if anyone sees any sore thumbs in what I say, please speak up!
-I hardly ever break 2000 rpms when accelerating or cruising unless I'm on the highway. I always shift before 2000 rpms, and sometimes closer to 1500. I go through gears 1-4 in a 30mph zone pretty quickly, even when accelerating slowly. I've seen discussions on this forum and the hypermiling forum about whether it's better to accelerate slloooowwwly, but have your foot spend more time on the throttle, or accelerate as quickly as possible given that you will never break 2000 rpms.... In everyone's answers and my own results, I've concluded that the difference in negligible - I couldn't even tell you which is slightly better. I go for the "accelerate reasonably quickly, and get to a coasting speed ASAP" plan.
-I use the pulse and glide method when I can, but I'm not a fanatic.
-I definitely use the turn-off method on big downhills (even on the highway) and long stoplights (over 8secs is the rule of thumb). I wouldn't advise this if you drive an automatic.
-I drive 55-60* on all highways and avoid cruise control except on flat areas.
*I will definitely break 60 and go however fast a steep hill will coast me up to about 80... but I hate to waste momentum. I will also speed up a little before uphills, then use the driving-with-load method, and try to end up going 50 by the time I reach the top of the hill.
Those are the most significant things.
In a nutshell, my goal is to keep my foot off the throttle as much as possible without being a safety hazard to other drivers. A minor annoyance is okay if I happen to force other drivers to go exactly the speed limit (boo-hoo!)
Also, with that particular car, make sure you keep oil in it - my old corolla burned a little oil, and I found that it was VERY important to my mileage to keep it filled up. I would check it every 1000 miles. Try a little lucas too, about a half a bottle into the engine along with the oil in your next oil change. I didn't see any significant increase in mileage while using it, but it certainly cannot hurt for its price.
Hope this helps, feel free to PM any very specific questions.
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