Have a wonderful trip!
The tips you have received are good...here are a few more:
Don't expect food on your flight. Most likely you will get peanuts and a 1/2 can of some beverage. Most airlines won't give you the entire can (cheapskates!!), but if you want it you can ask for it and they will give it to you. I always try to make sure that I eat something before a long flight and try to bring some fruit and bottled water with me. Food is also very expensive in airports and usually not very healthy,so I wouldn't plan to eat during the layover.
Bring gum for take-offs and landings. My ears pop something awful if I don't chew gum. I know this may sound obnoxious, but it helps me if I chew with my mouth open (to get extra air in) If you forget the gum, hold your nose and blow (with your mouth closed) to release the pressure in your ears.
It terms of things to take with you on the plane, I always travel with my toothbrush and toothpaste. You can buy cute little travel ones at the drug store that will fit in your purse. Time your self and about 30 - 45 minues before landing go to the bathroom and freshen up. Wait too much longer and you'll have to stand in a long line. I know you want to be cute and relaxed when you walk off the plan for the b/f!!
Speaking of cute and relaxed...Make sure all of your carry on stuff fits on one nice bag that can be stowed under the seat in front of you (with wheels is best!) As a friend that's flown before to help you with size. This is one of my personal issues, because I hate putting my stuff in the overhead bin! Usually it's too heavy and I have to ask someone to help me get it up there and I hate talking to strangers on planes 'cause then they think you want to be their best friend for the next 3 hours! In addition, when you stop on your layover you don't want to have lug a couple of heavy bags around.
Hopefully you have a window seat. I love looking out at a city--especially at night-- when we are circling to land.