Matt Petronzio has published "Net Neutrality's in Trouble. Here's How to Fight for a Free and Fair Internet" in Mashable.
The article describes and provides links to six sites that you can use to easily contact Congress and the FCC to support net neutrality, including the Battle for the Net, 5 Calls, the Free Press Action Fund, the Electronic Frontier Foundation, CREDO Action, and the ACLU.