I feel your feel your pain.
I was digging through my UFO's a few years back and almost had a heart attack. On one of my projects I still had lots of the main fabric to use (to finish it) .... but it was not with the main UFO ... oh no how will I finish it?!? I was lucky, I has set it aside in a place I would have never found it.... SO whenever something is 'set aside til later' it is ALL put into one bag! Now I know I can pull out any of my UFO's and all that I need is one place. whew