I also use the kettle to boil water and transfer it to the pan if I'm cooking pasta (or do it in the pressure cooker). I have a fast-boil kettle, which does use more power than slower ones, so maybe I should re-think things like that. I don't think that microwaved water tastes the same, though (and I'm not sure that water boiled in a pan does either, but I can't swear to that as I've only done it in emergencies).
My daughter was saying that she has started using longer washing cycles as they use less power than the shorter 'fast-wash' ones. I hadn't thought of doing that, and think that probably most of us do things out of habit, rather than because they are the more sensible way to do them. I don't really think about fuel much beyond hanging out washing instead of the dryer if the weather's fine, and wearing jumpers before putting the heating on, but that is going to change for everyone soon.
There are probably things I could do to trim a bit here and there. Most of them cost money in the first place, though. Luckily I have an air fryer and a heated airer already, but they will be expenses for those who don't. I am looking at programmable radiator valves, and plan to change power banks to ones with switches, so that I can turn off the power to plugged-in chargers without disabling lamps etc.
I was brought up to turn lights off when leaving a room, and close doors behind me, so I don't think there's much I can do there. I don't want to give up hot baths though - specially in winter.