The blackout was great, but be sure what it is you're against. Don't let this protest become misguided like the occupy movement. Call your state representative(s) regardless of your party affiliation. They probably won't talk to you, but leave a message and coherently express why you believe SOPA and PIPA are bad. Remind them that you are an American citizen that takes part in the democratic process, and tell them you will not support them if they support these bills.
Here is where you can find your representatives: http://www.house.gov/representatives/
Here is where you can find your senators: http://www.senate.gov/general/contact_information/senators_cfm.cfm
The first amendment is the basis of our country. Don't give up your rights.