One of the best things about DigitalNZ is saving the interesting things you find into sets of favourites. But to do that you first need to register an account.
Register by clicking on the signup link in the top right of the page:
Then enter three quick details into the form, a username, an email address, and a password. Then review and accept the terms and conditions before clicking on the signup button.
And you are done! You can then start collecting items into sets of favourites.