If you have permission to work in Australia, there are many resources available to help you find available positions all over the country.

If you are a holiday maker, for instance, you should keep in mind that even temp work can sometimes be difficult to find, especially during school holidays, as you are competing with students who are trying to earn money during their time off.

If you are looking for employment within a specific field, there are many specialist recruitment companies and job listing boards out there to help you. Some positions will only accept applications from permanent residents of Australia, so make sure you check for this requirement before bothering to send in your details.
Have a look at:

Seek
Career One
My Career
Job Search
Advertising Industry Recruitment
Byron Bay Job Listings
Sports Employment Australia
Hospitality & Leisure Recruitment
Studentworks
Graphic Design/Print Production
JOBNET (IT & T Professionals)
Health Staff Recruitment
Wagenet: Federal wages and conditions
Careers Online
Job Guide
JobPoint
CareerJet
Bojob