[PRH]

I have to agree with the yyyy-mm folders for organising. This is the system I use.

I also separate according to which camera I used because they output the same filename (Canon's ubiquitous IMG_xxxx or CRW_xxxx filenames).

I generally remember to within a couple of months when an image was taken. Though I seem to have less than half the images (~9500) some of you have taken. I guess if I had 22000 I'd think of other means of organisation or a serious kulling. The latter would probably be my preferred method (do I really want to tag 9500 let alone 20000 shots?)