Comics online

Read English language comics:
Even more than books with lots of dialogue, comics can be easy to understand and full of idiomatic language as it is actually spoken. There can be difficulties with slang, difficult to understand jokes and/ or dialogue written how people speak rather than with normal spellings, so try to choose which comic carefully. Usually, serious or adventure comics are easier to understand than funny ones.

http://www.lorencollins.net/freecomic/
http://www.gocomics.com/
http://marvel.com/
http://www.comicbookresources.com/

There are a lot more, try searching with Google as well.