After a busy holiday season, one of the most perfect gifts remains the allure of a good night’s sleep. Or really, a good afternoon’s nap for that matter—regardless of time of day, the ability to dedicate more than a few hours to rest and relaxation can pay enormous dividends. Last Friday marked the unofficial holiday of Festival of Sleep Day, a 24-hour period set aside for some serious “shut eye.” But thanks to the bounty of winter storms which peppered the....