Thitisan/Shutterstock Old razors can cause health problems like razor burn and skin infections, especially if you keep them in a moist shower where bacteria grows. Replace any blades that you’ve already used more than four times.
Mikhail_Kayl/Shutterstock Toss mascara after three months and products with SPF after six. For everything else in your makeup bag, a one-year expiration is an easy rule of thumb, says Novak. “It wouldn’t harm you necessarily—although it could, or cause blemishes,” she says. Write the date on a product when you open it so you don’t forget. Don’t feel the need to hold on for a full year though—throw out products as soon as they change consistency, color, or scent. Make sure you know when to toss out these 12 beauty products.
Plastic shopping bags
daizuoxin/Shutterstock Yes, those plastic grocery bags can come in handy, but that doesn’t mean you should keep an endless stockpile. Take a moment to calculate how many you actually use in a typical week. “Do the math,” says Richmond. “It’s what I use when clients are struggling with volume.” Add a pad of five or so to that number to give you a bit of wiggle room, she says.