I also just got back from a conference in Vegas week before last. Here are some impressions I had:
The monorail is great (super fast way to get from one end of the strip to the other), but is much more useful if you are staying in a hotel that has a station or is adjacent to one that has a station. Last time I went I stayed at the Paris and had reason to go to both the Venetian and the MGM, and I thought it was incredible. This time I stayed at the Mirage and got tired of crossing the street and going to the extreme back of Harrah's to catch the train. It depends a lot on where you are staying and where you are going. Although I didn't try it, I'm thinking the Deuce bus would be a good alternative.
Try Travelzoo for shows (
http://entertainment.travelzoo.com/las-vegas-entertainment/). I got a great deal on Blue Man Group there. Tix4Tonight is also great. They also have a location in the Fashion Show Mall (next to Treasure Island) and a few other places. I did see Cirque shows there, but not for 50% off. You should really be there when it opens (I believe at 10), and note that you may have to exchange a voucher for actual tickets at the box office at least an hour before the show and preferably earlier.
The buy one, get one for $25 Cirque deal is great. There's nothing like a Cirque show.
I love the buffets at the Paris, Planet Hollywood, and the Mirage.
Penny slots are just as much fun as higher denominations and you have basically as much chance of winning (slim to none!). Try the Star Trek machine with the vibrating seat or the Monopoly games (my favorite).
I second the comment on the hugeness of everything, both between resorts and inside them. I was surprised one day how tired I was and how my feet hurt when I didn't even leave the Mirage. Just dragging around the casinos can be exhausting, especially when they are highly motivated NOT to give you a direct route to leave! It's very easy to wind up going in circles.
Hope you have a great time! I'm sure you will!
