Managing finances is largely a matter of careful planning, but it's still something that many of us struggle with. The government-backed MoneySmart site covers a large amount of ground in covering basic financial management for Australians, looking at everything from personal budget planning to debt management to superannuation.
As it's a non-commercial site, MoneySmart does not have listings of individual products like credit cards or mortgage offers. However, that also means that (unlike most comparison sites) it doesn't drown you in advertising. It also means that the advice, while general, is specifically tailored to current Australian laws, which is often not the case if you just do some random Google searching.
Many of the calculators on the site can also be downloaded as Excel spreadsheets if you want your own copy. There's also lots of PDF resources and links to other government sites with relevant advice. If you spot a particularly handy webapp in MoneySmart's depths, let us know in the comments.