As someone who helps homebuyers and investors with all aspects of buying, including where and what to buy and at what price, I've developed some key guidelines for people considering investing in residential property.
Buy well to start with.
The two key elements to buying well, not surprisingly, relate to value. Specifically, they are buying below market value and buying in suburbs that will appreciate in price at a greater rate than other areas.
There are always opportunities to buy below market value; distressed sales, deceased estates, mortgagee sales, etc. If you seek these potential bargain properties as your primary objective you will have to have a wide-angle approach and be prepared to buy anywhere across the the region. You might be buying in some suburbs that you don't fully understand. That means you are buying blind.
A better tactic is to first select a number of suburbs that you consider are candidates for rapid capital appreciation. Once you have identified target suburbs you can start looking for comparative bargains within them. Don't necessarily just look for mortgagee sales and the like, there are too few of them and too many ambulance chaser investors following them. A bargain might well be a run-down villa in outer Kingsland next to a small factory. Will it always look like this or is the area ripe for redevelopment and likely to appeal to dual-income professional couples in the near future? You will still need to negotiate a good price and walk away if you don't get one.