Here is a hint: Did you know that many venues will release tickets to a performance about a week before the date of the show? These tickets are released from group sales and whichever blocks of tickets are being held for the performers friends and family etc. Frequently another final release of tickets sometimes really good ones just an hour or two before the show is set to begin. Of course it is nice to be able to plan ahead and knowing that you have early access to tickets during a presale is the best way to be sure you get your tickets to the show.