I just throw the stuff out when she is not home. I keep a folder of the past 3 months of stuff, which always appears full. One day she might figure it out, hopefully she won't care as much by then. I also throw away toys and small stuff without her permission or knowledge. She hasn't missed anything yet. I just can't let her collect at the pace she would like or we would be on a reality tv series by now. I do keep really special stuff (either special to her or to me). I put that stuff in a storage box in the basement.