Halfpoint/Shutterstock Running or walking shoes that easily bend in half at the midsole may increase your risk of injury. Give them the boot. Remember, the average sneaker life span: 300 to 500 miles, or about six months.
KANOWA/Shutterstock After ten years, smoke detectors won’t reliably warn of fire. Change them once a decade. Also key: Place alarms in and outside every bedroom and on each level of the home, and change batteries yearly. Learn about 15 ways technology can make you sick.