“I’m constantly playing and experimenting with new devices for biohacking sleep and cognition. One of my favorites is a very handy device called NuCalm, which I’ve been using to simulate an entire 120-minute sleep cycle with just a 20-minute daily power nap — and also (especially during these troubling times) to get myself a quick extra sleep cycle when I wake up early in the morning (4 am-ish) with thoughts racing through my head. There aren’t many items I own that I consider to be so-called “non-negotiable” biohacks in my daily routine, but NuCalm is undoubtedly one of them.”