From Roanoke Times:

One survivor of Monday’s shooting in Virginia Tech’s Norris Hall saved his own life.
David Stoeckle, chief of surgery at Montgomery Regional Hospital, said one Tech senior used Boy Scout training to stop the flow of blood from his right leg. About 3 centimeters of the student’s femoral artery had been shot away, Stoeckle said. The student wrapped an electrical cord around his leg, tightening it with the aid of another student. When emergency medical technicians arrived in the classroom, they put a proper tourniquet on the leg.
But the self-administered first aid was crucial, Stoeckle said.
“Without him taking care of himself … I think there’s a good chance he would have died,” the surgeon said.
The young man is doing well, Stoeckle said, but added “I think he’s going to be here awhile.”