We did most of that last winter. As for buying energy efficient appliances, we replaced our fridge freezer last year, we couldn't afford the most energy efficient models - or fit them in our kitchen as we were very restricted on the size we could buy and had very few to choose from.
We have insulation in the cavity walls and loft, but we need to replace the 35+ year old double glazing (aluminium frames, many of the panes are blown and have condensation between the layers of glass) and boiler (that apparently costs £8/month just for the pilot light, but I don't dare turn it off in case it won't turn on again) and can't afford that.
We've cut down on showers, use the immersion as little as possible (DS won't have showers), we halved the amount of heating we used last winter, if we halve it again we might as well not have it on. I spent last winter working in a jacket, fleece lined leggings and with a duvet & a hot water bottle.
Question if anyone knows - is it cheaper to have the boiler on lower for longer or less time on higher? I keep reading the former is cheaper, but the pump on the boiler seems to cost an extortionate amount to run.