Please try to enjoy it and don't let your fears overcome the excitement!!! Just think that statistically (sp?) speaking there are more chances that you get hit by a car when you are crossing the road, than crashing with a plane. Now, do you honestly think that something bad will happen every time you cross the street? I know that what we watch in the news really affects us, because we think that we could have been in their position, but on the other hand, if we were afraid to travel or cross the street we would stay home forever and not enjoy life. everyone of us could have an accident even when we are home, so don't panic and try to enjoy life and your vacations!!
I would suggest to take something before you board, and then on the plane, take deep breaths, take a really nice book with you, or listen to music so you don't have to listen to all the sounds the plane makes.