In no particular order these are my links for helping you find your New Zealand Ancestors.
Ancestry has 20 million records for New Zealand. These include The New Zealand Army Reserve WW1 1916-1917. Nominal Rolls 1914-1918.
Gallipoli is a good resource for researching the New Zealand Army Co
Free BMD Records exchange Australasia is a free genealogy resource to share vital information.
Free Electoral Rolls New Zealand. The 1881 Electoral Roll Covers North Auckland, Auckland Metropolitan and South Auckland areas in to the Waikato. It is the nearest equivalent to the British Census but only lists males .
BMD Records New Zealand. You can order Birth, Death and Marriage records from The Department of Internal Affairs BMD Registers.
Free BMD Records New Zealand. To protect privacy only historical records are available. Birth records from 100 years ago, Marriage records from 80 years ago and Death records from 50 years ago.