Originally Posted by
banshee10
And if you don't get the seat you want at the 24 hour point, check back a few times. Low-level elites can move themselves into PE if they're in an exit row, so all the moves out of the exit row won't always happen at the same time. (My personal seat preferences are: first row in PE > exit row > any other PE seat, assuming all those are window or aisle, then repeat for middle seats)
Setting an ExpertFlyer alert (if you are a subscriber) can be very helpful here.