Australia is a huge country with so much to see and do, so it's important to use your time wisely. Pick activities that will create memories for you and your traveling companions, and remember that you don't have to spend a ton of money doing it. (Australia is a very expensive country.)
Etihad Airways: Toronto - Abu Dhabi - Delhi (we stayed 4 nights in Delhi)
Jet Airways: Delhi - Singapore - Melbourne
Virgin Australia: Melbourne - Cairns - Sydney
Round trip for 2 = $6,319.44
South Yarra rental home $1,564.00 (5 nights/ 6 guests)
This included 1 parking spot, wifi, washer & dryer.
Great Ocean Road: There are various ways to see the Great Ocean Road. We took a bus tour that took us to each spot, photo stops, lunch and snack breaks. It was a really long day though, so I wouldn't suggest it for those with small kids or those who have trouble walking up steep hills.
Pullman Sea Temple - Palm Cove $1,380.00 (4 nights/ 6 guests)
Breakfast with a view: Far Horizons restaurant (drinks and 2 meals = $40, but well worth it)
Great Barrier Reef: SilverSonic boat trip $215/ person
Included lunch and 3 reef locations
Other ideas: Daintree rainforest, Kuranda train & skyrail
Visit the Opera House/ Sydney Harbour: Take a boat ride through the harbour
Other ideas: take the ferry to Manly beach, Blue Mountains, Hunter Valley Wineries
Hope you found these tips helpful! Australia is a wonderful place to visit, and I hope you have enjoyed seeing a snapshot of our trip.