Well, we “fixed” a few holes in the walls, as in, tried to insulate windows/doors etc better. Put “fur-seals” around the doorframe and window frames, refreshed the brushes in the mail slot in the door – those kinda things, to prevent draft.
Other than that, not much. We replaced our kettle with an Aqua Optima hot water dispenser, but that’s about it. Not much else we can do since we already weren’t that wasteful. Probably gonna use our tumble less (despite being a heat pump), and more air dry clothes.