Tod Maffin, technology maven for the CBC, writes about how freelancers should pitch by email:
Our show, and many likes ours, gets lots of pitches from people whose names are new to us. Which is fine; we've commissioned many people who are new. But you'll be even more effective if you have actually met one of the producers or spoken to them by phone before. Humans are social animals so make sure you get out and meet the right people, then pitch us!
The first time I read this, I actually thought he was referring to PR and marketing pitches. Regardless, it's good advice for whatever kind of pitch you want to throw at the nation's radio station.