I wrote most of this post after landing at the monster that is ATL airport in Atlanta. I could have considered half a dozen types of ground transportation in 15 minutes and saved 30–40%, but I grabbed a taxi instead. To use illustrative numbers: I didn’t want to sacrifice 10 attention units of my remaining 50 of 100 total potential units, since those 10 units couldn’t then be spent on this article. I had about eight hours before bedtime due to time zone differences—plenty of time—but scarce usable attention after an all-nighter of fun and the cross-country flight. Fast decisions preserve
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