It was a few months after the birth of our second child that I came to truly understand the effects of long-term sleep deprivation. Constantly waking up at 1:00 or 3:00 a.m. soon turned daily life into a hazy blur. I’d often find myself lying in bed, anticipating the next round of crying, or later in the night, I’d be tossing and turning for ages after being woken up. It’s no fun whatsoever to drag yourself out of bed every morning…