83 «Develop Perfect Memory with the Memory Palace Technique», Litemind, https://litemind.com/memory-palace/

84 Ibid.

85 Christopher Mele, «How to Find Your Missing Keys and Stop Losing Other Things», New York Times, April 3, 2017, www.nytimes.com/2017/04/03/well/missing-keys.html.

86 «How to Find Something You’ve Lost (or Misplaced)», Lost Box post, October 21, 2014, https://mylostbox.com/how-to-find-something-youve-lost-or-misplaced/

87 Dominic O’Brien, You Can Learn to Remember (London: Watkins, 2014), 116.

88 I encourage you to learn the Trachtenberg Speed System of Basic Mathematics. I adapted this exercise from the Trachtenberg Speed Math website: https://trachtenbergspeedmath.com/.