Lots of these should just be the way we live to avoid being wasteful, with money saving as a bonus!
When my dc were smaller I'd have a super hot bath then dc would jump in after, no one was ever especially dirty, so would have been so wasteful to empty and refill.
My dsis is a good seamstress so often fixes things for us, friend's dd just replaced a zip on an expensive coat for me
I've been passing clothes between friends and relatives for years, and dd2 has often work things dd1 has outgrown. And I love buying and selling on Vinted, just common sense surely
I shop at either Morrisons or Tesco for the points, and fuel is always Tesco- pays for a yearly alton towers trip. I can afford to pay for it but feels good to get it for "free"!
We're a jumper and blanket before heating house, again not especially to save money but it's unnecessary!
Lots of people would do well to go back to some of the old ways, from an environmental point of view if nothing else!