Ummm, yeah. I generally try not to tell people what to do or think (and it's even harder than you imagine, because I'm really bossy) but um, I'm about to. Because if you use the internet, and you want to decide which sites you visit, instead of letting AT&T or Verizon decide for you? You probably want to give your senators and representatives a call or an email or something. Mine don't seem to be supporting it, and I'll be writing to ask them why tomorrow. There's also a petition you can sign over here. If my explanation wasn't comprehensive enough, and you need more of a reason than Because I Said So, there's a Network Neutrality primer here, though that's a bit wordy. You might prefer to Ask a Ninja! He breaks it down fairly well.
But seriously, folks. If you're American, and you're here reading this, then this issue probably affects you, and there's a lot of money on the other side of it, so your voice counts.