A great place to start is business.gov.au. You’ll find a range of business plan guides and templates to help you.
For anyone interested in running a small business in the Eastern Wheatbelt region, the Small Business Centre provides basic information of the various business structures. Follow the Advice link to Business Planning and Structure.
From New South Wales, the Small Business site explains business plans and provides other useful information on starting and managing a business. Follow the Starting in Business link and you’ll find a link to Business Planning.
At Business Victoria you’ll find information, guides and samples to help you develop your own business plan. Follow the Staring a Business link to Business and Marketing Planning.