This is why I don't let my to-do lists automatically roll over. If it wasn't important enough to copy to today's to-do list, then maybe it's okay if it's never done. But I do keep them around in some form, because maybe the old to-do items had some interesting ideas associated with them that I might want to re-visit later. Or keep the 'cool ideas' and 'tasks to take action on said cool ideas' separate.