Looking for tools to be a better thinker? You might have a look at this Basic Logic Primer, or listen to the Fallacy Friday podcast, or the Logical Fallacies 1 or Logical Fallacies 2 podcasts. But one of the best free online resources for critical thinking is Critical Thinking Web. To see what sort of material the course covers, check out the site map here. An excellent resource.
Go to Critical Thinking Web.