--- /dev/null
+Eric Wastl's talk
+ https://www.youtube.com/watch?v=gibVyxpi-qA
+
+mcpowers' tips
+ https://gist.github.com/mcpower/87427528b9ba5cac6f0c679370789661
+
+epsalon's Perl repo
+ https://github.com/epsalon/advent_of_code
+
+betaveros' howto
+ https://blog.vero.site/post/advent-leaderboard
+ https://www.youtube.com/watch?v=jls4zhEhlog
+
+Vim:
+ increment a visual block
+ visual-block <number> g Ctrl-A (or Ctrl-X decrements)
+