The main purpose of Chaos Box is to quickly capture thoughts when there is no time to properly assign them to a project, context or date. But, if you have the time, it’s better to put it in a particular project. At the heart of effective planning lies the principle "If an action does not lead to a particular goal, it should be dropped." Therefore, it is important to periodically go through your Chaos Box and move items from it, either into projects or trash.