Like others have stated, the line to get thru security is ridiculous. I arrived early and it still took me 45 minutes to get thru. Plan accordingly or plan on missing your flight.
If you plan to take the train to the city, note that you can only buy a day pass for the current day - do not try to buy two at once for today and tomorrow, you may get stopped and warned, nicely tho
Signage not to clear bizarre arrows pointing every which way... Easy to confuse. Rental car facility is far away and requires a shuttle bus trip. Make sure you have extra time.
All the security lines have access to all the gates, ask an attendant or guard which line is short. It may be counter-intuitive, but I have saved tons of time walking to the farthest, shortest line.