Get out the vote
Without a doubt, the single highest point of leverage in any campaign is getting out the vote. If the people who agree with you or believe in you actually show up and vote, you win.
This, of course, is true for everything, not just retail politics. Your non-profit, retail store or b2b services firm probably doesn't need as many new prospects as you think you do--you will generate more impact if you reconnect with the people who already know and trust you.