You arrive at the airport, go through security, get to your gate and sit down. You pull out your phone to start listening to music, and it won't turn on because your phone is dead. The despair hits; how can you handle a long flight with no phone or music? Before you let the panic take over, look for a charging center! Most airports have them in each terminal so you can charge up your electronics before your flight boards.
If it's an older airport and you can't find a charging center, try looking for a TV. Most have USB ports that you could plug your phone into instead.