Dog bed
Shoe laces...
...which actually come in handy!
Remnants of shiny silver flexible metal-y stuff, held in place by upholstery tacks (and yes, I am completely trying not to come up with uses for shiny silver "metal" and shoe laces in an attic. Maybe a dog house and leash for the attic canine??)
Dead bodies*
Doc Ock's winter coat
*Okay, okay, it wasn't really a dead body, just my brother, who we stuck in the attic with the fantastic job of getting rid of all the blown-in insulation. After two days of that (and the job only 1/2 done), he only wishes he were dead. Thanks, D!