How to survive a long school coach trip?

I have a 9 hour drive tomorrow! I'm going to London and I'm having trouble finding ways to avoid total insanity!

Just some ways to avoid boredom please, oh and any good apps for iphone 4?

Listening to music
Dumb ways to die
Happy pudding jump
Logo game

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I was on a 17 hour coach trip to Paris with some idiots from my school once, I feel your pain, long road trips are so boring! My advice would be to:
a) take a book, or two, if you read
b) take some magazines
c) if you are travel sick, definitely take a tablet or two with you
d) take an ipod or a nintendo ds or something portable
e) take lots of food!
f) apps for iphone like wattpad, candy crush, temple run and that farm saga one are very addictive and time consuming
g) take a pillow so you can maybe sleep in the car/coach
h) have a good time in London! It's fantastic, I went last year to see Wicked on a science trip with the school… The national science museum and history museums are both absolutely fantastic

I've been on a 5 hour bus journey with the school and i found that these helped:
-listening to music
-eating sweets
-playing on games such as:
-candy crush
-pet reacue saga
- dumb ways to die
-doodle jump
-fruit ninja
-talking to your friends
-sleeping
-causing trouble
-pissing off teachers
-throwing food down the bus

For the few bottom ones you would need to be sat right at the back of the bus with loads of people who like causing trouble.