Come with plenty of time plenty of traffic jams in the airport. If you don't mind paying for parking your better off parking to avoid the traffic jams.
Give your self an additional hour to the standard time time before your departure. If you're taking a shuttle from rental. Give your self an additional 1.5 hours before departure.
Don't buy any drinks if you are transferring terminals for a connecting flight, they're not connected and you'll have to go through TSA again at your final terminal
The line of people waiting for a cab at midnight was wrapping around the block and the supershuttle driver directed a poor man to the wrong car "to have fun".
Be happy and enjoy the flight. There are a bajillion other worse things you could be doing. Like digging ditches, being incarcerated or sitting in a boring meeting.