If you loved Twilight and can't think of anything else, try picking up these movies and books for a little bit of extra entertainment before New Moon comes out. Plus, some great TV shows to wait for so that you aren't constantly thinking about the next movie=]
Movies
Harry Potter and the Goblet of Fire (ROB PATTINSON!!! But you should watch the other HP movies too) PG-13
Adventureland (When it comes out. Kristen Stewart, duh) R
The Cake-Eaters (When it comes out. Limited release. Kristen Stewart again) PG-13 (I think)
Thirteen (Nikki Reed in 2003) PG-13
Books
The Host by Stephenie Meyer
Marked (House of Night book 1) by P.C. Cast
Betrayed (House of Night book 2) by P.C. Cast
Chosen (House of Night book 3) by P.C. Cast
Uglies (book 1) Scott Westerfeld
Pretties (book 2) Scott Westerfeld
Specials (book 3) Scott Westerfeld
Extras (book 4) Scott Westerfeld
I absolutely LOVED the Scott Westerfeld series. You should definitely read it. And even if you read really really fast, it'll lat at least 2-3 months. Which will take you to the next season of a few TV shows that'll keep you entertained!
TV Shows for Teens
Degrassi- The N (It's already season 8 or something. Don't even try to catch up lol just start watching you'll catch on)
The Secret Life of the American Teenager- ABC Family (you are going to have to watch Season 1 first, the 2nd season starts in June)
The O.C.
One Tree Hill