Has anyone tried or uses the Zeo Personal Sleep Coach (press coverage).
It's a sleep tracker - measuring light, REM, and deep sleep - which sounds useful for improving sleep which as we all know is extremely important to mental performance and learning and health. I'm thinking of getting one, but the $200 pricepoint is a little daunting.
There is a $.99 iPhone App that does essentially the same thing using the phone's accelerometers, etc. called Sleep Cycle http://www.mdlabs.se/sleepcycle/ It definitely seems to have had a positive impact on my mornings. Less biometrics than the Zeo probably, but certainly more economical if you have an iPhone.
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.