I have been going through my photo folders and renaming them YYYY-MM-DD Description. OH MY GOODNESS!! I set a timer for 10 minutes and work. If I didn't take a break, my eyes would go cross from looking at the screen!
I also have been deleting some junk shots as I go. So far it has taken me forty minutes! I still have a few more folders left (about thirty-five)! From now on, I'm always going to do this!