When not working with original material recorded directly in the field (which isn't usually ethical for journalism, but is fine for other types of work, such as documentaries, podcasts, etc ...), adding music and sound effects can be really helpful to move an audio story along. It's important, however, to hit that right note, not sound too cheesy, or over the top, or quickly dated.
The catalog of copyright-free music of Kevin MacLeod is used by many. Looking for a news jingle? YouTube is the best audio library in the world, and it now has a distinct copyright free audio library section Free Sound is my favorite for a sound effects library. Here are some others: http://www.pdsounds.org/, http://soundbible.com/free-sound-effects-1.html and http://www.audionetwork.com/sound-effects.
MoMA PS1 :: Opening June 19th (Fathers Day) - September 3rd.
If you found this tutorial useful, check out previous installments: