So I have tons of photos taken all the time. I have a lot from years past that I never went through (meaning deleting duplicates, etc). I've got a new pc with windows 7, and I'm wondering what a good process is to organize those photos. They're in folders that have really no meaning (it used to be people would put them in a folder wherever, even the desktop or somewhere else, not just the My Pictures folder).

I'm going to keep all pictures in the "My Pictures" folder from now on.

I've used Picasa from g=Google, and it works great. Is this the recommended free software for this?

What process do I use to move the old pictures over in to new "organized" folders?

Lately in Picasa when I import off my camera card, I would just select something that names the folder after the date it was taken. Is this advised?

Just give me ideas on how to stay organized with photos. Should I tag them also? Should I rename the file names? Keep in mind I have over 16,000 photos I'll have to go through, so it can't be anything to thorough.