In 1974 when the fuel crisis hit in the US (and gas started out that year at 29 cents per US gallon!) there were lots of things learned to improve mileage. One of the things my mom suggested to me ( a teenage driver - as if I'm gonna pay any attention) was to use the brakes as if there were an egg under the pedal and you don't wanna break the egg.
These days I drive easy... when I drive at all. We combine errands and very rarely go out for one item only... which is a real "luxury" in driving! Kev commutes to work by bus, and his 1995 Nissan pickup, which gets 20mpg, has only 56,000 miles on it! So I don't feel bad about being an oil energy consumer.
We keep our heat low in the winter, and with new double pane LowE vinyl windows replacing single pane aluminum, we have reduced our heating costs by 10%. Our electricity here in Portland is about 40% hydro. It used to be 100% until the last 15 years or so. We pay about 8 cents per KWH here. Up a little from 7.5 cents a couple years ago (including most fees)