Information Processing Chapter:
Hack 13. Catch Your Ideas—the end of this hack warns that one might be overwhelmed by ideas, and i know just how that is true.
Hack 14 (like Hack 09, pdf’d)—involved “speedwords” a sort of shorthand for taking notes. (I suddenly think about the possibility of taking notes on a linux iPod with morse code: these speed words would be an extremely useful addition)
Hack 15: understand your learning style(s). See http://tip.psychology.org/index.htm & http://www.vark-learn.com/english/index.asp
Hack 16: mind maps; Hack 17: “exoself” (hipster PDA) Hack 18: pre delete cruft (I get it, but - ah - to do it!)

I stumbled upon the book in the SFPL Safari subscription. Today i read chapter 1 on memory. I think i can kind of come up with a system of images to go to digits that might work for me, inspired by the first few hacks. (I’m thinking of the sun and nine planets.) Some of the other hacks are far beyond what i would ever want to attempt, but the Lewis Carrol technique for number memorization with rhyming couplets might be worth trying.