We buy local so farmers market or local fruit market.
I also buy all meat/fish at the butcher, or specialty free range meat shop. Same with free range local eggs. This is actually my highest priority. Buying free range costs a bit more but we don't buy much packaged stuff so it works out.
Try to buy as additive free as possible.
I also buy in bulk where I can.
The majority of our food really comes from the markets then staples from aldi. I barely buy anything from woolies or coles anymore.