Strap on a headband, and the Zeo Personal Sleep Coach—basically, a $400 alarm clock—will tell you all about your night, graphing when you were in light sleep, heavy sleep, or rapid-eye movement sleep. Upload to the Web, and you can “slice, dice and cross-compare your sleep data in a million ways,” David Pogue writes in the New York Times—and the Zeo might even help you sleep better.
You can have your sleep rated and compared to other nights; you can get suggestions on how to sleep better. “It’s truly amazing, if not a little creepy, to see all of this data about a part of your existence that you’ve known nothing about until now,” Pogue writes. All the analysis doesn’t make you sleep better, he says, but “you do wind up getting better sleep” because you’re so focused on it. (Read more sleep stories.)