I've been going to SDCC since 2007 and every year I learn more about how to get around, what to see, and how to make the most of my time. I found that doing a lot of legwork ahead of time pays dividends later!
One of the things I like to do at Comic-Con is hit the parties. This means using contacts. checking out blogs and Facebook and Twitter to find where they are, who to contact and getting on the list! A bit of work now will get you in the door so I am already working to make it happen. Fingers crossed everyone!