Vote based on what you think will benefit you, and be done with it.
Hmm.. Isn't that a rather minimalist practice of good Citizenship? I am pretty sure most people won't benefit significantly differently, individually, based on who becomes the next President. But the overall direction of our Civilization can change dramatically – as the last 8 years have demonstrated forcefully. I think being a little more concerned about the future of Community/State/Nation is not entirely useless.