Going to Vegas for the 1st time - Any Advice?

So I am going to Las Vegas in less than two weeks for a mini vacation (4 days/nights) and was just wondering what some of the best things to do there are (besides the obvious shows/gambling) or if anyone knows of any hidden gems in the city because it's my first time there.



I don't have a lot of time there so obviously anything that takes a whole day to get to (like a national park) is out of the question.



Just for reference, I am 23 and I enjoy shooting craps.



Thanks guys