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Good health https://www.usine-digitale.fr/article/le-parcours-sante-de-demain-sera-numerique.N201367 is actually maintaining an effective rest routine, which, for most people, implies 8 hours of quality sleep each night. As a country, we are actually persistantly sleep-deprived. It increases the immune system, helps avoid cardiovascular diseases and boosts mood. Source: learn here, see this.