Project Table View: Change the order of tasks from alphabetical to order it was entered

In the table view of a project, the tasks are in alphabetical order instead of order they were added.  I know there are two ways to change this but both are a manual process (create an additional custom field called 'Index' and place the numerical value in the column next to the appropriate task - this takes way too much time) OR (add dates and sort by date - we don't always know the due dates right away).