Traditionally, journalists have more or less worked alone. Journalists in both the news business and feature writers for magazines typically will develop their stories, dig up their leads, conduct their interviews and draft the final product themselves. In the newspaper business, major stories will sometimes become collaborative efforts where several reporters are working on aspects of a story and their work is edited into a single piece, published under multiple bylines.
Communicating with a journalist was generally a haphazard affair, placing a call to a switchboard or desk and leaving a message. Today, major newspapers all have websites and provide email addresses for most of their journalists and nearly all of their columnists. People who write columns and opinion pieces are generally more open to communicating with the public because their work is often designed to generate controversy and feedback is important. Occasionally columnists will find ideas for new topics in the email traffic they receive, or will write about the heavy response they received on a particular piece.
A journalist with some initiative can take this communications process one step...