2013 Grand Control of the Year: Union of Concerned Scientists

"[It's] still an important source of new members," he says. "I've always heard that organizations that stop mailing to supporters and begin using only online communications see a drop-off in overall giving, even from donors who had only given online before. The mail continues to be a channel that donors rely on for news and information about an organization — even if that communication is a reminder to make a new gift."