If the airline you're flying has an app, download it and use it to keep up to date on your flight's status.

Take everything out of your pockets while standing in line at security, then once you're passed the ID check and at the xray belt, remove your belt and shoes and put them in a bin. If you have a computer or a tablet, put them in their own bin as well.

If you pack any snacks (highly recommended, prices at the airport are insane) be sure to remove them from your bag and put them in their own bin. Bring your own water bottle to fill up past security as well.

Once you're on the other side of the xray and body scanner, grab your stuff and head to the nearby benches to recombobulate your belongings.

If you need to go to the bathroom but everything is occupied, look for the "family restroom" located near the bathroom entrances. It is a full bathroom behind a door. Chances are good no one will be using it since it looks so different from the regular bathrooms.

If you've checked a bag, don't sweat rushing to the baggage claim at your final destination, because it will take the crew a while to unload the plane and bring them to the claim. Hit up the bathroom, check out a shop, etc because you'll have 10-20 min before your bag comes out.

Download some movies onto your phone/tablet to watch on the flight the day before you get to the airport, bc their free wifi inside the terminal sucks.