For both forums and email newsletters, Google (or Bing if you must) are your friends -- just do search "[industry] newsletter" and "[industry] forum". Yes, it t

For both forums and email newsletters, Google (or Bing if you must) are your friends -- just do search "[industry] newsletter" and "[industry] forum". Yes, it takes some time to do the research, but you'll end up with a good pile of resources that will be helpful. Subscribe to the newsletters you find and read the forums -- it's another great way of finding out where you should market, hang out, and who to talk to.