Please go to the SCADP website, here and in the article named "Take Action," on the top of the page - click on each of the three links to see how you can help.
The NC Racial Justice Act is the most urgent action (for the Carolinas) right now; they may vote on it today. The Matthew Shepherd Hate Crimes Prevention Act has already passed the U.S. Senate and will go to conference committee in September. (The problem is that - apparently in an effort to kill this good and necessary legislation - a death penalty provision has been attached to it. The death penalty provision must be removed in conference committee.)
Several abolitionists from South Carolina expect to go to Savannah for one or more of the Troy Davis canvassing weekends - Anna is in Charleston - Kate is in Columbia. If you can go, please contact Anna or Kate: firstname.lastname@example.org, email@example.com.
Also, Amnesty International is hoping to take a bus to Washington, DC on September 26 for a rally in support of Troy. There may be the possibility of a bus from several areas. Contacts in South Carolina would like to know if you would be able to go.
(Update above slightly paraphrased from Anna - find out more here and here)