Our fuel bills here in Blighty have shot up over the last 2 or 3 years. It's a real worry. Last year I actually rationed the heating. I never used to do that. And we have as many real fires as we can as we had a tree chopped down by our garage. Pensioners over here are frightened to put their heating on because they can't afford it. Really.
We rationed ours a couple of years ago. The bills actually seemed to go up. Last year I left the heating on a constant setting, but turned the thermostat down to 18C (from the previous year's 20C). The place was warmer but the bills were less (despite the annual 7-10% hike).
This year, it's been mild in my part of the Mudlands (sic - it was a proper typo, but it's suitable and made me laugh, so I left it). Not much heating required.