When it comes to being "practical," Capricorns know how they like to sleep, when they like to sleep, and where they like to sleep, and if any of those factors are off, this earthy zodiac sign can't fully relax. "Capricorn are notoriously stubborn and can become obsessive about things they cannot control, particularly in their relationships and careers," says Thomas. "This means they can sometimes become anxious at night, but if they feel grounded, expect them to adhere to a very strict sleep routine."