Do Las Vegas deals go here, or on one of the many Las Vegas related threads? Anyway, here is a good deal I found. New members at the Tropicana get up to $200 in losses from slot machines reimbursed on the first day thier membership is activated. It's on the tropicana website. If anybody else has any good Las Vegas deals, let me know.
Always go Tuesday and leave Friday. Flights are cheaper, hotels are cheaper, and the place is less busy because the Californians usually drive in on Friday and leave on Sunday.
The shows suck (mainly because the real headliners are there Friday and Saturday), but really, if all you were going to do was watch Cirque de Soleil, you'll see it for less if you go during the week.
Anyway, my wife and I went in the middle of the week a few years back and had a really good time. It wasn't a ghost town or anything, but we never had any problems waiting at a restaurant, waiting in line for an attraction, etc. And because there are so few people, you can go to those 1/2 price ticket counters and save a crapload on shows. You can pretty much see whatever you want for a lot less.