hello,
Buy meat in bulk packs from a butcher not coles or woolies they charge way too much and the quality is crap. Bulk might be a bigger upfront cost but will save you more in the end

also buy fruit and veg from local markets or small fruit and veg shops they're half the price and once again better quality I work at my local markets tomatoes cost over $3.00/kg at coles we sell them at around $1.80/kg