Movie quiz help!!

I got linked to this quiz from the Empire magazine twitter feed ages ago (15th September) and it's bugged me ever since, because I can't get all the answers. I can't find anywhere on the site to get answers from, and I'm stuck stuc stuck!!

So far I have the following...

1) Spiderman
2) Dead Poet's Society
3)
4) Mean Girls
5)
6) Kes
7) Pleasantville
8)
9) Meaning of Life
10)
11)
12) Clueless
13) Heathers
14)
15)
16) Breakfast Club
17) Wild Things
18) Karate Kid

Can anyone see any others? By the way, I DON'T want answers!! Please, please, please just give me clues so I can get them on my own!!