We used to go there often, even had a timeshare there (we did manage to sell it at a small loss.) I can't gamble. I worked in statistical processing for a while, and all I could see were the ways to loose money.
But, Go see the free shows at Caesar's Place, TI isn't as good as it was, the Volcano is still neat and there are others. Walk the Venetian, Bellagio, there are circus acts at Circus Circus and the others usually have something.
If someone invites you to a free anything, it is a sales promotion for timeshares. Keep your hands in your pockets until they give up the free tickets to Viva Las Vegas and a buffet somewhere.
Go to at least one of the big shows. I think that they are all Crique Du Soliel now, Search the web for deals before you go.
Matt
We used to buy several hundred pounds of rare books at the used book stores and freight them home.