Contemplate whether my perception of what I look from the back actually matches up with what the actual image of me from the back actually appears to be like (in elevators with mirrors).
Boobage adjustment if needful.
Briefly consider which part of the elevator would be most advantageous in which to position myself in should a strange psycho stalker type enter and me be stuck alone with him.
Consider what I'd do should someone follow me off the elevator into the empty hall where I would normally then enter my room.
Press buttons of all floors before getting off for my own amusement.
Check whether they are wusses that skipped floor 13 for luck purposes (everyone knows that 14 then is just as unlucky even if you call it 14).
Mentally add up how many people could fit into the elevator before hitting the weight limit. What does the average person weigh?
Enact out loud possible conversations with different people I am thinking about. Usually hastily ending them (but not hastily enough) just when the elevator opens to let someone else on. Pretend like I was just working on memorizing something (rather animatedly...)
Examine nose and teeth for anything that looks foreign. Remove.
Reassess what all I've got in my purse these days.
Hunt for my room key.
Contemplate what I would do if I were stuck in an elevator. Decide I'd be fine with it, until I remember that at some point I'd want to pee. Then what?