I was just at the Hoover Dam to see the new bridge, pretty spectacular. Are you driving or taking a tour?
If you like Penn & Teller, it's a good show. I may be in the minority, but I liked Mystere more than 'O', mainly because you feel closer to the action.
Too many good restaurants. Since I stay at the Venetian, I tend to dine there. An afternoon margarita & tacos on the canal at Taqueria Canonita is always on my agenda as well as dinner at the bar at B&B.
Take a stroll through the Forum Shops at Caesars.