"If you want to make political impact, don't have discussions about politics on blogs; go do something that makes the best use of your skills. Start an organization, work on a campaign, make political issues your profession or a major personal project."

You omit the most important step, which comes before starting an organization. That's figuring out what politics this organization should espouse and how it should espouse those politics.

If my views are almost diametrically opposed to Robin Hanson's, and I have no good reason to think I'm more rational than Robin or otherwise in a better epistemic position, I'm not rationally justified in setting up an organization to espouse my views because I should consider, in that event, that my views have at least a .5 chance of being wrong, probably much higher. The worst think people can do is set up political projects based on ill-considered principles to end up advocating the wrong policies. As long as rational, informed people disagree, one isn't entitled to a strongly held political position.