you can do a % and have it taken direct from your payment, or simply ask for a dollar amount each fortnight. think you can add the tax deduction via online services - or it takes about 2 minutes once you get to a consultant on the phone.

if you save it yourself at home, you're likely to use it if money gets tight and not have it if needed - if you do it through c'link/FAO you will have an enforced savings if you don't need to pay it kwim? it can be added, amount changed, or removed at any time