Create an account
Fill in the registation form to get a new user account for yourself.
Once you have your account you can upload packages with new names, but not other existing packages.
If you want to upload a new version for a package uploaded by another user, you should contact that user and request to be added to the package's maintainer group.
Upgrading an account from old Hackage
You can modify various settings for your account, including changing the password, as well as creating authentication tokens, at the account management page.
If you forget your password you can reset it so long as you know your user login name and the email address you originally registered with. The system will send you an email with a link you can use to set a new password.