Tix4Tonight, with six locations in Vegas, sells same-day tickets to more than 70 shows, at up to half off regular prices. The show list is posted each morning at 9:30 a.m., with sales beginning at 10. Get there early; the lines can be painfully long. But as the expression goes, good things come to those who wait: Tix4Tonight has tickets to popular shows, such as the Cirque du Soleil's Mystère and Fab Four Live, a Beatles tribute show. Check out the website's Sneak Peek to get an idea of what's on offer before you go—the list of available shows changes daily. For example, just today Tix4Tonight had 50 percent off tickets to Fab Four Live.
The booths have been around since 2002 and are so popular that a seventh location is being introduced at the end of this month in the Casino Royale Casino & Hotel, which is close to the Mirage, the Venetian, and Harrah's on The Strip.
In addition to show tickets, you can get discount tee times at local golf courses and discounts for meals at local restaurants. There's also a $2 off coupon that's downloadable (it'll save you a pesky service charge).