If you've been sleeping on the same mattress for more than eight years, it's time to start researching a replacement. (Fun fact: the average lifespan of a mattress is 8 to 15 years.) You'll spend a third of your life in bed, and if you're losing sleep because of a lumpy, old mattress, you can justify buying a new one … for health reasons. (Although we're pretty sure it's not tax deductible, like your HSA.) Spring for a good mattress made with natural fibers -- they keep your body temperature cool, which is crucial for good sleep. If you're up for a serious splurge, try a Hastens mattress, which is handmade from wool and cotton -- prices start at $6,500, but it's guaranteed for 25 years.
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