I generally shop with a list, if I don't forget the darn thing and leave it at home. I cut out coupons, the ones that require purchasing only one of a given item and not 2 or 3. I look for clothing sales at high end stores, thinking the quality is better and they'll last longer. And I try to fill the car when the gas station has 5 cents a gal off, on weekends'n Wednesdays. But these aren't really changes. I've always done these things.
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https://www.amazon.com/author/bonnie.mill-lemke
https://kdp.amazon.com/en_US/bookshelf