I keep my log book on an excel spreadsheet because I cant add up! I then transfer the enteries to my official log book.
The reason I mention that is I started keeping an anotated record just on the spreadsheet of each flight. Sometimes it is a simple comment like "bit bumpy, intersting x-landing", or "XYZ, nice pub lunch" sometimes a bit more involved. Anyway I now find it interesting looking back and it reminds me of flights I would have long forgotten.