Black Friday (and/or Cyber Monday) may be the best days in the whole year to buy a deluxe memory foam mattress… or anything else for that matter. The discounts are deeper than at any other time. Retailers are frantic about moving merchandise, so frantic that they might even be willing to haggle over already slashed prices. It’s a shopping bonanza! Of course, along with the frenzy of consumerism comes sleep’s number one nemesis: anxiety. Americans are already an anxious people. According to the World Health Organization, we’re the most anxious population of any country on Earth. It’s no secret that anxiety is dangerous—in addition to affecting sleep (or perhaps because it does), anxiety can lead to heart disease, diabetes, obesity, and depression. And the holidays are notoriously high-anxiety times already. So, before Black Friday washes over you in all its sale-y glory, protect your nerves with these five easy tips.