using methods of mass instruction like writing blog posts, administering a meetup, or launching a whole rationality movement is a lot more effective than arguing with your mom

Might be useful/instructive to think of actual best strategies for how your average person can increase the world's rationality. ("Start a rationality movement" is taken, writing blog posts doesn't actually expand the audience of rationalists unless people link to them from elsewhere, and maybe your local meetup already has an administrator.) I think this post has some good ideas, but I am a little worried that people will stop telling their friends about LW because of it, or something.

One idea might be to integrate rational thinking in to your every-day small talk? I'd guess there'd be less resistance then than if you were trying to win an argument.