In reply to davidbeynon:
Its taken me several years but I have finally deleted all my unwanted images digital of 30,000+ and put the rest into folders. I have also got on top of tagging every single JPEG in my collection from over the last 10 years.
Trust me, tagging 13,000 images takes a lot of will power, especially as most of them have over 10 tags each. I have also used face recognition software to name everybody that is important to me. At one point I thought that I was scuppered when I used Picassa and it corrupted about 10,000 tagged images, but I'm over that scare.
My top tip would be to rather tag your images than keep them in folders alone. Rather than try to remember what folder my images are in, I now think of a few descriptive words and I can get hundreds of images that I haven't seen in years.
My next task, and one which I have been putting off for over 10 years, is to scan all my old photos and add them to my digital collection. But this is too much to think about.