Great article I found courtesy of Metafilter:
How to Get Into a Sold Out Concert
I’d like to dedicate this one to Izzy’s Girl, as she was recently rumored to be swimming upstream for Bruce tickets @ Giants Stadium.
The best tip from the article in my opinion is:
Rule 6: The will-call window is your friend. The will-call window is the portal to the Lost World of Orphaned Tickets.