Member Discounts

Hi,
I recently joined the Wildcats and saved nearly the whole annual membership fee on my health insurance.
https://www.ozbargain.com.au/node/153768

It got me thinking about whether there were any other discounts like this available…

I know there are various ways to get 5% of Coles and/or Woolworth gift cards but does anyone know of any memberships that offer good discounts?

Jason