Pile of Indexcards

In my PoI method, one of important search key is own "history". To search a certain indexcard, I must remember "when" I wrote the indexcard or the event was happened. This is something like Rob did in the movie High Fidelity (ref. 2006.09.05. 20:51).

I can't remember all of the indexcards' contents, of course. Rather, I write indexcard to forget. To enhance memory in time axis, I do following things,

• Try to remember "when" the event was happened
  
• Use calender to trigger memory
  
• Review indexcards sometimes
  

When I review my indexcards, I feel like I'm riding on time-machine

# This topic is based on discussion with Mr. R. B. Thank you.