10 THINGS I'VE HAD TO BRUTE-FORCE MEMORIZE DURING MY LIFETIME, RANKED

I'm not good at memorizing or remembering things. Ranked by my perceived-memory difficulty, easier to impossible.
  1. 10.
    All the US Presidents, in order
    By choice at age 50.
  2. 9.
    Solar System Planets
    Elementary school, back when Pluto was still a planet.
  3. 8.
    HTML 2.0
    1995, for work
  4. 7.
    Song Lyrics and accompanying Guitar Chords
    For various random one-off performances.
  5. 6.
    Gettysburg Address by Abraham Lincoln
    Elementary School?
  6. 5.
    Tap Dance Choreography
    By choice, ages 47-55
  7. 4.
    Jabberwocky by Lewis Carroll
    Junior High School English class
  8. 3.
    Names of my wife's 18 Utah cousins
    1987-present (And their X children, where X = I'm still not sure how many there are?)
  9. 2.
    Various elements of Linguistics and Semantics
    For a grad school English course taught by a fan of Chomsky
  10. 1.
    Periodic Table of the Elements
    High school chemistry. The one D grade I honestly earned.