I keep all my stuffs in store folders. I find that this is the easiest for me since I do so much CT work I go to store then designer. I organized this way when I was mainly a shopper too. All my pages are saved in a folder on my eHD called completed layouts. I keep the psd, full size JPEG and save for web size. There is no order to this at all!!!! I then upload the full size JPEG to Flickr which keeps the file name and then it gets put in separate albums according to subject, year, and team. So if I need the psd again, I check the flickr name and find it that way. So one page might be in six albums in Flickr, but that way when I am ready to print, I can click on an album, and all layouts pertaining to that subject are in it.