No toiletries except plain bar soap, shampoo bar, 30p toothpaste and bicarb. Just wash my face with cold water.
Have solar panels, so I try to run the dishwasher/washing machine in the early afternoon and cook dinner on the induction hob if it's something like chilli that can be warmed up later. Also try to charge up gadgets during daylight.
Try to never use the tumble drier, unless it's a bright sunny cold day... prefer to use the washing line or clothes horse + dehumidifier.
Sink washes, and warm up a large jug of water in the kettle rather than running the electric shower. I spray myself with a mister bottle, soap up, then rinse off with the jug of water. I wash my hair with cold water over the bath.
Prioritise really nutrient dense but cheap foods in my food budget, eg sardines, mackerel, eggs, liver, lambs heart, beef mince, cheddar cheese, greek yoghurt etc, and only buy really basic seasonal vegetables like onions, potatoes, cabbage, leeks & carrots. Fruit if it's on special offer in Aldi, and Aldi frozen berries. Cut out nearly all snack foods like crisps, chocolate and biscuits both for health and budget reasons... I'd rather target my money on nutrients.
Use good quality but no frills household products, eg Aldi laundry powder, 3 in 1 dishwasher tabs, Stardrops diluted in an old spray bottle for cleaning.
Only set the thermostat to 16 - 17 C. Sometimes we put it on for an hour's boost in the morning, then about 2 or 3 hours in the evening. I'll stick a woolly jumper, hat and socks on rather than crank up the heating. Also, having the laptop on me keeps my knees cosy.
If we're using the woodburner, I'll stick a kettle of water on there for my hot water bottle and evening cuppa, rather than use the electric kettle.
I darn holes in socks and jumpers etc. Most of my clothes are from charity shops/ebay/vinted, but I've cut down on that in the past few weeks.