There are two things you can do:

-  Recover it using [iForgot][1] using your email/security questions. This is the best thing to do if you forgot your password as it saves the hassle of creating a new one

-  [Create a new Apple ID.][2] Bear in mind all previous data will be lost.


  [1]: https://iforgot.apple.com/password/verify/appleid
  [2]: https://appleid.apple.com/account