Now we're cooking with gas
In Xin's house, we have instituted rather austere restrictions on power and water use. There is no need to be profligate with resource use - efficient routines and habits are the key.
I'm also housesitting my father's house while he and his family are away on travel. He has no qualms about power use. It took me two weeks to notice he had the bathroom towel rail on. And another week (now) to think to run down to his bathroom to turn that one off. The shower here doesn't sprinkle, it saturates, and does so faster than the shower can drain the bottom. He has a wastemaster for scraps (we have a worm farm and a compost heap). His uses gas to heat the whole house (fortunately I don't need to use that).
It is a constant contrast.