- Reread book 1-6. That should keep you busy for a while.
- Watch film 1-5. Make it a marathon with your friends. Don't forget to dress up like Harry.
- Read the Harry Potter books in a foreign language.
- Read millions of fanfictions on fanfiction.net.
- Play with your Harry Potter collector items.
- Speculate with your friends about what is going to happen in book 7.
- Try to fly a broomstick.
- Convince yourself that Harry is your imaginary friend. You'll have loads of fun.
- Look for leaks on the internet. You'll find so many different versions of the so called original book you'll get so annoyed that you won't even want to read book 7 anymore.
- Camp out in front of your bookstore, even though it's three more days til you can actually buy one. But hey, you're a fan!