Shampoo and conditioner. A dime-sized amount of shampoo is enough for most heads of hair, especially since most of you should only be sudsing up your roots, not your ends. Same goes for conditioner, of which one pump is enough and should only be used on your ends.
Lotions and skincare products. This is especially true for acne and anti-aging products, which can dry out your skin and cause irritation if overused. A pea-sized amount is enough for just about anything you put on your face. A tablespoon of lotion or sunscreen should more than cover your body.
Laundry detergent and fabric softener. There are a few reasons you’re using too much of this: One, most newer washing machines use less water, so you thereby need less soap, and two, detergents are more concentrated than ever, so you don’t need as much of it. This is especially true if you’re washing white clothes and adding bleach, which is already going to clean your towels. In fact, experts say you’re probably using 10 to 15 times as much as you need!
Dishwasher detergent. Not only is this in the same vein as laundry detergent in terms of concentration, using too much suds in your dishwasher can actually damage the machine. Lifehacker has great tips on maximizing cleanliness of your dishes.
Household cleaners. For most household cleaners (like surface sprays), you can use half water and half cleaner and get identical results. When you run out, save the old bottle, buy a new bottle, and make two bottles by filling with half cleaner and half water.
Toothpaste. We’re not saying to stop brushing your teeth, so don’t use this as an excuse to be gross. Just remember that dentists say you only need a pea-sized amount, so if you’re slathering on enough to cover your toothbrush from end to end, you’re overdoing it—and wasting money.
Mouthwash. You don’t need a full cap full of mouthwash unless you have a giant mouth, especially since gargling and swishing it around your mouth is part of what makes it work—and you can’t do that without the space in your mouth that overdoing it will take away. Half as much gets the job done for most of us and will save you money.