Something that has been on my mind since the milk thread and having a look at this website: http://www.ethical.org.au/
Factors I look at are:
Product of Australia
Preservative and colour free
Australian owned company
It's getting harder and harder to get food that is Product of Australia AND manufactured by an Australian owned company.
Then I find it hard to choose between food manufactured by an Australian owned company, made in Australia but using a mix of local and imported ingredients vs overseas owned company using Australian sourced ingredients only.
Admittedly looking for preservative and additive free stuff means I can walk past most of the stuff anyway.
I have set brands of things I do like to buy, but after reading the ethical guide in the link above, realised that I can do better. I ended up coming home from from the supermarket with a headache.