I call this "the 10% rule". Whatever you are using, try using 10% less: 10% less laundry detergent, 10% less shampoo, 10% less toothpaste, 10% less hamburger in your casserole. Chances are, you won't even notice that 10% is missing -- and saving a penny here and a penny there DOES add up!
I laughed thinking that's what you were referring to. In the military, the 10% rule = "You must be at least 10% more intellegent than the machine or item you intend to operate. Otherwise you must find someone smarter than yourself." Kid you not they use it!
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