My solution is that a disenchanted Democrat and a disenchanted Republican team up and each vote for the independent or third party of their choice. This way the siphon off votes in pairs from each of the two "major parties." They don't affect the balance between the Democrat and Republican, but they do help third parties. They could both vote for the same candidate, or two different candidates.
What is required is meaningful dialogue between a would-be Obama voter and a would-be McCain voter -- real work. But through that dialogue, people can break free of the partisan chains the establishment tries to bind them with. Dialogue and yes, even Love, defeat the political establishment.
Can we make it possible for people meet up, exchange ideas, maybe met to find a "vote buddy" they can make a pact with? I'm interested in exploring these possibilities here on LJ, and I welcome interested people to continue the conversation in the LiveJournal community that I've set up: http://community.livejournal.com/votepa
Of course, people might get the idea from here and do this with someone they know in some other part of their life -- a friend, a co-worker, a relative, a neighbor, a debating partner, a tennis partner, whatever. They could then write about what they've done, make a youtube video, whatever, to spread the word, perhaps become "matchmakers" to help others find their "votebuddy." Let's see what we can get started.