Not taking the wisdom of nature seriously and, in particular, failing to appreciate the possibility that a considered intervention (e.g. polyphasic sleep) might do more harm than good.
Failing to do all sorts of things that I would have enjoyed merely because they involved some trivial inconvenience.
I've heard a few people say that polyphasic caused them lasting harm. Was that the case for you?
This is a repository for major, life-altering mistakes that you or others have made. Detailed accounts of specific mistakes are welcome, and so are mentions of general classes of mistakes that people often make. If similar repositories already exist (inside or outside of LW), links are greatly appreciated.
The purpose of this repository is to collect information about serious misjudgements and mistakes in order to help people avoid similar mistakes. (I am posting this repository because I'm trying to conduct a premortem on my life and figure out what catastrophic risks may screw me over in the near or far future.)