It is actually alot easier than it seems and an excellent example of this is the California Recall. You see, the hardest thing that third party candidates face is a lack of support and exposure. They lack the proper resources to get ahead. With the recall, it was an independant effort that gained momentum because people were excited about it and they let people know about there cause through other mediums outside the media. Granted, it did become a ratings boost, but that was only after the movement gained momentum. What we need is a charasmatic and intelligent candidate and a dedicated group of people who can get their candidates message to the people. One simple lesson learned in advertising is that the most effective form of advertisement is word of mouth, and ironically, that is the most neglected form of campaigning. If the people know and trust the candidate and they share some core beliefs, they will vote for that candidate, regardless of party.