Notes from February 4, 2018 (decision journals, Mayan civilization, more)

Farnam Street has been an interesting blog lately, including this post about keeping a decision journal, and this post about the rules of the road of investing.

In other news, reports that researchers have found a sprawling Maya network discovered under a Guatemalan jungle. has a nice pie chart that shows how Apple makes its money (hint: 70% comes from the iPhone, 7% from the Mac). has this article, 21 questions Amazon asks its job candidates.

Finally, here’s a series of tweets where Alastair McAlpine “asked some of my terminal paediatric palliative care patients what they had enjoyed in life, and what gave it meaning.” (Highly recommended reading.)