For those of you on discovery/vitality you can get your point to multiply. As mentioned earlier from next year you won't be getting a cash back on your Discovery credit card any more and thus need to make use of the smart shopper card benefit.
Check it out.
http://discovery.co.za/portal/loggedout-individual/smart-shoppper-multiplier.
I have worked out that if you are on gold vitality status and you buy about R4000 worth of stuff you can get back about R3490 back per year.
Here's the calculations for those who care.. Assuming Gold status on your vitality and you have a Discovery credit card.
1000 points = R10 cash
4,000 x 12 = 48,000 points
48,000 x 8 = 384,000 points
384,000 / (1000 * 10) = R3840 cash back.
R3840 - R350( Discovery Card costs) +- R3490 cash back per year or about 7.2% cash back on your expenses.