I love this post about voting with my dollar. http://necessarymeans.wordpress.com/2012/08/23/are-we-voting-with-our-dollars-or-just-lying-to-ourselves
However, that is more of a capitalist activism. We still have to speak up and use our voices on all other issues. As needed, I send emails about important issues and concerns to my political representatives. It is so easy to find your political reps by area. http://www.govtrack.us/congress/members/
Or you can sign up for Change.org and any other petition site to make your voice heard with millions of others. We don’t have to act like democracy is some huge impossible task. It is simple enough to send an email, make a phone call, or sign a petition once in a while.