One of the ways you can really save some serious cash is shopping directly from the factory outlets.
In Sydney they even have factory outlet bus tours where people spend all day going to different factory outlets and buying bargains at wholesale prices.
This is a website directory of over 3,000 factory outlets around Australia, and you can type in your area code or suburb and locate any outlets within 25kms, or look for individual products. It gives opening times and often parking information.
Check it out, and happy shopping!