September--this is a great idea! I say go for it...with the following caveats:
1. Only make cold calls on a Tuesday, Wednesday, or Thursday afternoon. Like Arlene says, agents are super busy getting their existing clients jobs, so don't get in the way of that. Agents are especially busy on Mondays (returning all the calls not returned from last week) and Fridays (returning all the calls before leaving for the weekend), so the middle of the week is always better.
2. Call at the end of the day. I think between 5:00 and 5:30 is the best. This is the time when things have slowed down for the day, plus the assistant may have left already, and you will have an easier time getting the agent on the phone directly.
3. You totally need to work that MTV VMA gig!! DO IT!!!
4. Do not be afraid of the phone.
5. Do not be afraid of email either. You can always email the agent with the same intro line as the subject line...and include the link to where your demos live on line.
Also, for the lady in NYC who says she can't rep you unless you live there...follow up with an email..thank her for her time and offer, tell her you have a studio at home, blah blah blah, and if she ever starts working remotely with clients to give you a shout. You never know...
Keep us posted with your progress!
Bestest-
Anna Vocino
www.annavocino.com
www.breakintovoiceover.com