Please take five minutes to watch FreeForm’s video about the open Internet, and then share it with as many people as you can:
Then, if you’re a US citizen, head over to the Save the Internet Campaign and sign their petition to congress to preserve net neutrality. Also see FreePress’s links on how some telecoms companies are artificially skewing the debate and presenting the false impression of a grassroots movement against net neutrality.
(Still confused about what net neutrality is? Wikipedia has a great overview.)