If you're looking for show tickets, come here 1st. No reason to pay full price on show tickets.
They have several locations throughout Las Vegas and I have yet to find a better deal for show tickets [unless you're getting them comped through the casino]. Be sure to print out their coupon (http://www.tix4tonight.com/coupon.html) for a discount on their "service fees".
All of their available tickets for that day and the next day are posted on large lcd screens and if you want suggestions on what to see, their staff is very friendly and informative about the shows. I've been using them for several years and will continue to use them for any show tickets in the future.