Make sure all your gear ( belt, shoes, wraps, etc ) are on your carry on. Linament, oils, etc will need to be checked or mailed separately unless in containers under the TSA guidelines.
If you're lifting on Thursday Try to get in Tuesday so you can adjust to the room, schedule, etc.
Bring food with you so you can eat while in transit. Would suck to end up going 12+ hours with no proper nutrition. Sure you could eat airport food, but who knows what that could do to your stomach before the meet, etc.
Relax and accept any delays/screaming babies/mouth breathers that come in the way, stay as stress free as possible.
Don't forget a battery pack and a spare charger!