Manual ordering of tasks opens a new opportunity to have GTD "next actions" show up automatically with the addition of an "isfirst:true" advanced search function designed to return the task ordered first in a list (or subtask ordered first under a task). BY manually ordering tasks in the order to be done, the task first in the list is the "next action." A smart list that included "is first:true" would return only next actions. Once the task at the top is marked complete, the next task would move to the top of the list and show up in the next actions smart list.