If you run a little backwater website (like a friend and I do) that still gets some viewers, take a moment and put up a banner noting your opposition to SOPA and PIPA. The superficial victories we've seen recently aren't permanent.
Reddit and Wikipedia are going dark on Jan 18th in protest. I think shutting off entirely is a move better suited to sites with clout, but it sure can't hurt for any site to put up a notice. It's better than just standing on the sidelines and cheering on Wikipedia and Reddit.
No one will see this post, because I fucked up my DNS entries when I changed DNS providers. But I know it's here.