HARO or Help a Reporter Out is a site where you can sign up to get email notifications and alerts when a reporter is looking to write a story about a particular topic. Once you sign up with HARO, you will start receiving a list of different topics that reporters are looking to write about in your email inbox.
Each day presents an opportunity to potentially contribute to a story that could go on to be published in the New York Times, the Wall Street Journal, Wired, or any other online and offline publication. Simply monitoring this site on a regular basis is an extremely passive way of finding opportunities to get your name out there.