For those of you who have been watching Game of Thrones on HBO, you know how confusing the plethora of charactors and relationships can get. Even having read the books, I still get a little mixed up at times. This iconographic is really helpfull. You can see all the relationships laid out as well as the character names, family names, rivalries and deaths. It is how things are at the begining of the series, so there are no spoilers.
Originally found at slashfilms.com
Also, here is a map of Westeros where the majority of the story takes place. The Daenerys story line takes place to the east, across The Narrow Sea.