I wasn't sure if this has been mentioned in the past, but there are a TON of daily deal websites that give you really great offers on places to go and things to do and stuff to buy. So I thought I'd list them. Feel free to add if I've missed any.
www.grabone.co.nz (also does booze and tees)
www.groupy.co.nz
www.spreets.co.nz
www.dailydo.co.nz
www.1day.co.nz (make sure you check out the links at the top for tee-shirts, wine and 1-day-out)
www.nzsale.co.nz
www.grabaseat.co.nz (for flights of course!)
I will admit to buying 3 vouchers for $1 Hell Pizza and a voucher for 2 beers for $2!! (all from Groupy who've had some great deals this week!).
Admittedly not all of NZ is covered by these, but I also used them for when we went on hols to Taupo. I kept checking out Grab One's deals for Taupo and got two meal vouchers and cheap transport for the Tongariro Crossing.
For beauty stuff, www.strawberrynet.com has been recommended to me today.