The American collage/assemblage artist Joseph Cornell kept a whole house full of miscellaneous stuff, from baby doll limbs to little wooden containers. It all went together into the stew, and it resulted in some amazing art. Why not with writing? :)

I have Teh Oodles of Written Bits floating around too, though I'm rarely able to plunk a scene down in a story. Often times I'll come back to something later and find I already have reused it in some way, or that I'm finally (two years later) ready to start it.