My usual routine these days, get there about 3 hrs before KO. Walk from our lot to the Strip, usually do the Pita Pit(holds me over nicely until after the game and not as crowded as other places). Then about 2.5 hrs before KO, make my way to the stadium, watch the Walk, then enter the stadium(gates open at 2 hrs til KO) for the long ass walk up the ramp, to the top, hang around on the outer rim, watch the MDB make their way in, then hit my seats, watch intro vids and then stand for 4 hrs, screaming my bloody head off.
Now as for the OP, make sure you get there 4 or 5 hrs prior to KO, so you can check out the quad, Denny Chimes, The Bryant Museum before making your way to get something to eat, either at one of the vendors on the quad, at Rama Jamas or on the Strip. Then you can do the other stuff I listed or just wing it.