For discounted rates on Las Vegas hotels and airfare, see if you can arrange your vacation in the off-peak travel months. These include July through September. Typically Las Vegas hotels reduce rates during these months to increase occupancy. You may even be able to find very affordable rates at some of the five-star hotels.
Las Vegas is world-renowned for its entertainment. While some shows and nightlife can cost a lot of money, there is a lot of entertainment that is free. Every night there are light shows on Freemont Street. Bellagio has a fountain water show set to music that runs throughout the evening hours.
You can watch a volcano erupt in front of the Mirage Resort and see a pirate ship attack titled "Sirens of TI" at Treasure Island (TI). During certain times of the month there are festivals such as First Friday, which is an art festival held in downtown Las Vegas on the first Friday of every month. There are numerous other free activities in town, but hours change with the season, so check the free local tourist magazines to see the latest schedules.
Comps are complimentary items that hotels give to guests as incentive to stay within the resort to gamble, shop and basically spend money. Comps can include room upgrades, a complimentary dinner or a credit to spend in the casino.
Especially if you are a gambler, go to the Players Club kiosk, which every hotel has, and sign up for a membership. Not only is it free, but the more you gamble, the more the hotel is likely to give you complimentary services.
If you are a frequent guest, the next time you make reservations, the hotel may offer more discounts on room rates or even give you a complimentary room.
When you arrive in Las Vegas, you will see many advertisements and magazines with tons of coupons that typically offer very good deals. Do not be shy about using them; they can save you a lot of money on activities and entertainment as well.