Go to Eggslut for breakfast
If you enjoy clubs the Ghost Bar is fun, although it's a pain to get in, its a roof top club/bar on the 55th floor - it also has a glass dancefloor
If you are walking along the strip - comfy shoes. It doesn't look that far from place to place but is actually a lot of walking and the taxi lines end up insane in the evening
Fremont Street is interesting too. You can also do a zip line along the length of the street if you're into that ! They also have a very bizarre light show that plays on the roof every so often.