Favorite thing: The Octagon is the central "square" [actually and obviously an octagon] in the centre of the city. It is well laid out with a nice covered walkway alongside the road thru the middle. A variety of people hang out here, from students, to vagrants to diners and tourists. There are a few eateries around the perimeter, cafés and restaurants and lunchbars and even an Irish pub. Something for everyone. Also the main Information Office is found conveniently in the Octagon.
It would be a good idea to make the Octagon Information Centre your first stop in Dunedin - you'll find so much of what you need here - brochures, information, can make tour bookings here, and the staff are very friendly, helpful and efficient, with plenty of people going through, but no long waiting queues at any of the times we were there.
Also souvenirs for sale.
Right next to the Octagon, just past the info centre’s red English phone boxes on the left, down Municipal Lane, is a very clean and brand new looking toilet complex, with nice carpeted waiting area with lounges, a staffed counter, and lockers for $1 per day (locker hire for travellers – very handy, and the lockers are a fair size, not too narrow).
Locker hire: 8.30 am – 8 pm Mon – Sdat & Sun: 9 – 4.30 pm.
Also baby change area. The complex is located next to the library.