Shopping hungry and without a list is a reliable way to overspend. Keep a running list on your phone, check it before you go, and try to stick to it. Compare the price per kilo or per litre instead of the sticker price when you are choosing between sizes.
General tips from the Cashflow Team, not financial, tax or legal advice. Your situation is different, so talk to a qualified professional before big decisions.
Track it in Cashflow
Cashflow: Budget Manager is a free app to scan receipts, set budgets and savings goals, and see where your money goes.