You never check airport monitors for flight information
While it’s great to subscribe to flight-status updates on your smartphone (sign up for these when you check in to your flight), don’t use them as your only source of information. Airport monitors are still your best bet for the most up-to-date information. Double check your gate before you get on the trolley that takes you to the other side of the facility.
Are you a nervous flyer? Read 6 Facts About Flying to Help You Stay Calm on Your Next Flight.