Pile of Indexcards

I have been preparing for a presentation next week. I have tried to do this task with my indexcards. This is the next stage of the PoI method.

1. I scanned and reviewed last four months' indexcards in the Dock (for work). I picked up about forty indexcards related to the title of presentation.
   
2. I make small piles of common topics as seen in the picture. Each piles is consisted by one to four indexcards, but no limitation. A chronological order is not important now.
   
3. I put memo, correction, etc. for past indexcards with red pen. I write new indexcard to interpolate between topics.
   
4. Each piles are compiled into slides of Keynote (or Power Point :P). Besides Keynote, I use Adobe Illustrator, Omni Graffle, LaTeXiT, gnuplot and GMT.
   

川喜多二郎 (Kawakita Jiro) introduced this card-handling method in "発想法 (Hassouhou = abduction)" (1967). Now this method is known as "KJ method" (The "KJ" is initial of his name).