Maintain your weight.
I’m not the most successful with this item, but I know that maintaining your weight is a very good way to save money. First, you aren’t eating more than you need, so your food bills might be a little less. Secondly, your heath will benefit. Even overweight people are better off maintaining their weight rather than getting caught in the yo-yo cycle where they gain and lose large amounts of weight. Thirdly, when you maintain your weight you can wear your clothing until you wear it out.
I think this may be the most challenging of your series… -S