For the statewide races, the best way to oppose the "corporate duopoly" is to vote for the Green and Peace & Freedom Party candidates. Unlike the Democrats and the Republicans, Green Party and the Peace & Freedom Party candidates do NOT take corporate money -- so they're not puppets of the corporations! And the more votes that the Green and Peace & Freedom candidates get, the more it will help us to move away from the "corporatocracy"!
For recommendations beyond the statewide races, please see: https://www.indybay.org/newsitems/2014/05/12/18755681.php
; and: http://www.peaceandfreedom2014.org/