PROBLEM: You use a long drop-down field in your forms and have to rebuild it all the time.
SOLUTION: As of September 26, 2012, there is no way to save a drop-down field. I advise that you save a simple TXT file with all of the choices to make it as easy as possible and to ensure consistent spelling.
WHY: This has been suggested as a future enhancement. If it becomes available, I will post the solution here.