Research has shown that people shopping with a list spend less than those without one. Without a list you are more open to random impulse purchases.
No, have a small meal at home before going shopping as you are less likely to buy rubbish foods to fill that immediate need to have something in your stomach. A small meal could simply be a bowl of oats before you leave.
According to statistics of the Australian market, Woolworths has the largest market share at 37.2% for the 2017-18 financial year. Coles followed at 30.3%. ALDI was third and then a number of smaller retailers such as IGA, Costco, newer entrants like Amazon will continue to expand their presence.
A rain check is a note or coupon you can get from a supermarket if a product that is on special that week has run out of stock. The rain check will state the date, how long it is valid, the price of the item, the quantity requested and the item details such as product weight and type or flavour. You can then return to the store when the product is back in stock and pick it up at the sale price.