ACL Fest usually sells out of three day passes in a hurry after releasing their lineup. The festival has noted that single day tickets will be available this year for both weekends, but those may sell out as well. One of the best ways is to secure your spot at Zilker Park in Austin is to be ready at 10 a.m. CST when the tickets go on sale. Back in 2003, my friend and I setup as many computers as possible to get VIP Bonnaroo tickets when they went on sale. It worked, but doesn't always secure a place in