Basically, unless you're a billionaire (or a red wall idiot who believed all the claptrap about levelling up), whatever the Tories tell you to do, if you want to survive, let alone thrive, do the opposite.
So if they tell you NOT to worry about energy use, I'd suggest you start looking into Kelly kettles, portable (NOT disposable) barbecues, super sized flasks, insulation (including yourself), wearable blankets, hot water bottles, haybox/slow cooker/wonderbag methods of cooking, solar panels, and even solar batteries.
Take showers. Share the bathwater. Have a strip wash. Use wipes. Reuse the bathwater and washing up water as "grey" water if you can to water plants etc. Think about whether your clothes REALLY need washing. Run the washing machine when it's a full load. Don't use the tumble dryer - if you live somewhere warm and dry enough hang the washing out, if not and you're in a position to have one, get a heated drying rail or a dehumidifier with a laundry setting. Look for second hand and reconditioned (and not everyone will be able to afford one even then).
Work out what you've got that you can eat that doesn't require cooking/heating or that only requires a bit of hot water to rehydrate, and get ready to cook/do laundry etc overnight if you're in a house where you can (ie NOT a flat). If that's not an option, think about the old ways of doing things - poss tubs, scrubbing boards, mangles.
I really wish I was joking, but this is how my parents (grew up during WWII) had to live, and it's evidently what we're on the verge of going back to. Well, okay, not the solar panels, since they didn't exist, we had to make do with battery, wind up, and candles, but definitely the rest. I'm old enough - just - to remember the Winter of Discontent. In the north. When winters really were winters. Every year, not just occasionally.
Don't take everything they say as gospel, but the various prepper boards and programmes often have some very useful suggestions.