Because It's Old/Expired
64. energystar.gov
Replacing old appliances with new, energy-efficient ones saves money and fuel.
65. Running shoes should be retired after 300 to 500 miles in order to prevent injuries.
66. Deep-six your toothbrush every three to four months.
67. Swap your pitcher's water filter every two months (or as directed).
68. Change out disposable air conditioner filters once a month during cooling season.
69 Replace the batteries in your smoke detector at least once a year.
70. foodsafety.gov
Find the USDA's recommended storage limits for refrigerated and frozen food.
71. Throw out mascara and moisturizer after three months.
72. Discard foundation and sunscreen after six months to a year.
73. Keep concealer, lipstick, eye- and lip liners, fragrances, powders, blushes, and shadows for only a year and a half to two years.
74.-76. Say goodbye to the dried-out remnants of your favorite no-longer-available lipstick, and check out threecustom.com, T.J.Maxx stores, or Lancome's beauty bye-bye program for replacements or duplicates of discontinued cosmetics.

Because You Don't Want to Suffer from "Stuck Song Syndrome"
77. And these five tunes are among the most persistent: Chili's "Baby Back Ribs" jingle, "We Will Rock You," the "Mission Impossible" theme, "YMCA," and "It's a Small World After All." (Tip: Try drowning them out with classical music, which is less likely to haunt you after it's turned off.)