- Language
- Greetings, "thank you," and, "you're welcome"
- Hirangana (more cursive than the angular katakana) is taught first to Japanese children
- Sign language
- Geography
- Math
- Music
- Other
- Logical fallacies
- Theses
- DDS (for nonfiction)
- Chess moves
- Openings
- Strategies
- Doomsday rule
- *
What not to
- Events
- Birthdays
- Sync Google Calendar to Facebook friend's birthdays
- Near useless
- Phonetic alphabet
- unless you're paranoid about implying what you're thinking about when clarifying letters to someone else
- Poetry
- (really just undecided)
http://ask.metafilter.com/20594/What-should-I-memorize
http://www.japan-guide.com/e/e2047.html