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“execution really happens”
: Ibid., 13.
Be Lazy
“I am not busy” and “Idleness is not just a vacation”
: Kreider, Tim. “The Busy Trap.” 
New York Times
, June
30, 2013. http://opinionator.blogs.nytimes.com/2012/06/30/the-busy-trap/.
Much (though not all) of the research cited to support the value of downtime was first brought to my attention
through a detailed 
Scientific American
article on the subject: Jabr, Ferris. “Why Your Brain Needs More
Downtime.” 
Scientific American
, October 15, 2013. http://www.scientificamerican.com/article/mental-
downtime/.
“The scientific literature has emphasized”
: from the abstract of Dijksterhuis, Ap, Maarten W. Bos, Loran F.
Nordgren, and Rick B. van Baaren, “On Making the Right Choice: The Deliberation-Without-Attention Effect.”
Science
311.5763 (2006): 1005–1007.
The attention restoration theory study described in the text: Berman, Marc G., John Jonides, and Stephen Kaplan.
“The Cognitive Benefits of Interacting with Nature.” 
Psychological Science
19.12 (2008): 1207–1212.
I called this study “frequently cited” based on the more than four hundred citations identified by Google Scholar as of
November 2014.
An online article where Berman talks about this study and ART more generally (the source of my Berman quotes):
Berman, Marc. “Berman on the Brain: How to Boost Your Focus.” Huffington Post, February 2, 2012.
http://www.huffingtonpost.ca/marc-berman/attention-restoration-theory-nature_b_1242261.html.
Kaplan, Rachel, and Stephen Kaplan. 
The Experience of Nature: A Psychological Perspective
. Cambridge:
Cambridge University Press, 1989.
Ericsson, K.A., R.T. Krampe, and C. Tesch-Römer. “The Role of Deliberate Practice in the Acquisition of Expert
Performance.” 
Psychological Review
100.3 (1993): 363–406.