A Reddit group called "Financial Independence" has a weekly thread where frugal people share tips and hacks for saving money. Here are a few highlights . . .
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1.  Cut sponges in half. Once you're used to it, a full sponge feels like overkill.
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2.  Never buy the newest tech. A three-year-old iPhone is almost as good as a new one. Their rule is replace your tech, but always stay three years behind.
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3.  When you go out to eat as a couple, split one meal. A lot of restaurant meals are too big anyway. If you need more food, split an appetizer too.
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4.  Switch back to bar soap. It's a lot cheaper than body wash and lasts longer. Some people think it's better anyway.
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5.  Order your groceries online, but pick them up. It saves on delivery fees, and you'll spend less on impulse purchases than when you shop at the store.
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6.  Slow down while driving, and don't gun it at stop lights. One person tested it and gained about three miles per gallon, which can add up.
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(BuzzFeed)