NPR's 100 Best-Ever Teen Novels -- how many have you read? How many can you read before the end of 2015? Make a list and start checking them off! Many other challenges will appear at the bottom of the page so you could also try one of those.
2015 Reading Challenge -- here's one that will encourage you to read books across a wide range of genres, styles, and time periods for all sorts of quirky reasons. I'm taking this challenge too! Are you in?