If you want to write a book (I'm basing this on the second to last sentence in your post), try doing NaNoWriMo. Go to nanowrimo.org, and sign up November 1, then challenge yourself to write at least 1700 words a day for 30 days. Periodically check in and input your word total. At the end, if you achieve the 50,000 word goal of NaNo, reward yourself with something, like a tee-shirt. That's what I've done, twice. It was the single most powerful thing I've ever done fo rmy writing, and I used to be TERRIBLY blocked.