This report addresses challenges researchers face in communicating the broader impacts of their research with peers, educators, students, the media, resource managers, and policy makers. It highlights the main points made at the 2004 American Geophysical Union (AGU) fall meeting session entitled “Broader Impact: What busy scientists need to know.” This report was published in EOS Vol.86, No.12, 22 March 2005. It is available as a pdf download.