Don't all To-do lists keep a record of what you checked off? I guess the article is saying that list should be emphasized more? A good webapp for that might be

Don't all To-do lists keep a record of what you checked off? I guess the article is saying that list should be emphasized more? A good webapp for that might be http://Trello.com http://Trello.com. It seems to be made for dragging tasks from Todo to Done.