I identified with this author, who started Piazza, a collaboration tool for educators, based on her own challenges and feelings of loneliness in education. Though I always felt support during my education experience, and have always felt comfortable seeking the help of others, her recommendations of starting with your experience, finding a common denominator, and trying to live without your idea are all great ideas in testing your business ideas.
Women 2.0 » Former Facebook Engineer Launches EduTech Startup Piazza.