if you're venturing off the strip a bit and hit one of the Station Casinos, sign up at
http://www.weluvlocals.com
for free show tickets (although they sometimes have only crap left over) signup at
http://www.showtickets4locals.com
Always signup for the player's cards. A lot of them come with 2 for 1 buffets, coupon books, etc.
Also, one of the local news channel's website has their deal of the day type things that are sometimes better than Groupon or Living Social
http://deals.8newsnow.com/engine/Spl...ontestid=42389
There are also all kinds of discount ticket places just a little off the strip.