I just got back from Vegas two weeks ago. Serious response: Get tickets to the Sphere. Get seats in the farthest back row you can. DO NOT sit up front and DO NOT sit on the sides. Nobody sits there and the seats will be empty. I saw Postcard from Earth and it was amazing. Whatever show you can see, go see. The outside is amazing, the inside is amazing, and the actual show will be amazing. Go to Mandalay Bay and get a drink at the 1912 bar - push the bookcase in and close it behind you. Most people look at the bookcase and just keep walking. After that, go next door to minus5 bar. Wear the coat and gloves they give you.
Fremont Street is worth going to. I like it better than the strip and it's way more affordable. If you are on the strip, tell the cop hookers to go eff off. Grab their spanking tools and throw them as far as you can if you get the chance. F**k handcuffs as well.