You don't mention what day of the week or time of year you are going. i never fly in or out on a weekend, so I don't experience the wait times that are mentioned here. I usually do get to the airport early anyway (better safe than sorry), and end up shopping (I always have to buy a Soap Opera digest, since i missed the stories!), and getting something to eat. The longest time it took me to get thru the check in and security was about 1/2 hour. But, I usually fly either Tues or Wed afternoons.
Have a great trip!