I reuse grocery bags for the trash. Have quilted panels in doorways so I only use 1/3 of my house in the winter. Consolidate trips. When I figured out how much just gas was per mile, I learned to not make extra trips. Never mind the oil, tires, insurance, etc. I only buy items on sale - even when I have the money. I have Christmas money for dog walking gloves. I found the perfect pair that were within the amount, but left them there because they weren't on sale. I cut my own hair, have never had a manicure - nor do I want one.
I could reduce my expenses if I didn't have two dogs, but I'm not to that point yet. I need back surgery, of which I have to pay 10% and now may need a new roof this summer. These two would keep me awake nights if I let them.