Yeah dont mess with security.. check you airports website and see what the rules are so you dont bring anything and get it thrown out or introuble.
As for flying... I HATE it... scares the crap out of me. I loved it when I was kid. Now I am afraid (no not b/c of 911) it's b/c I have a fear of heights (yet i love rollercoasters) and a fear of planes... I have no clue where this fear came from either. That and I hate the noises the engine makes it freaks me out (that may be my biggest problem).
Last time I flew I was crying on take off, landing, in the air..... on all 4 planes.
My best advice... bring headphones and a cd player/ipod/whatever... then you dont hear anything and you are fine, I think thats why I was ok as a kid.. I was occupied with music and gum. You can swallow too if you need to pop your ears, thats the only way mine will pop.
Oh and if you get stuck next to a kid... I suggest you ask if you can move to an empty seat away from them... esp. small ones... they SCREAM.... (i understand why I dont blame them, but its horrible to sit next to).