This takes a lot of work and a lot of organization, but by that time, your campaign is a larger, practiced, smoothly functioning organism (even though you feel tired and stretched.) You make your GOTV plan,;you carry out your turnout strategies, you keep track of all that valuable data you've collected -- and often, you win!
(Even if you can't win -- because that is not always possible -- you've become stronger and more powerful because your organization has learned a how to run a hard campaign and meet a lot of new allies and potential members.)