I swear, my head will explode if I have to wait one second longer for Suzanne Collins' Mockingjay. Of course, once it does come out, I'll read the whole thing in one night and then be sad that I don't have any more Hunger Games. Are you too suffering from impatience or end-of-a-series depression? Here's what gets me through: fan fiction.
There is some incredibly awesome fanfic out there, set in the worlds of your favorite series. It's endless, and a lot of it is really, really good. Also, it lets you explore and imagine in whole new ways. What if Bella had never met Edward? What would the Hunger Games have looked like if the story were told from the perspective of Foxface? What if Voldemort had an heir? You never have to leave your favorite stories, even long after the author has ceased to write them.
You can find tons of fanfic based on books, movies, anime, comics, and television at http://www.fanfiction.net. Have you imagined a whole new story set in the post-apocolyptic landscape of Gone? Have you been having dreams about new and greater challenges for Katsa from Graceling? You can sign up and contribute your own for the world to read.