Bottled water is expensive unless you're drinking contaminated water. Though portable, it can cost you and the environment over time.
If you can cut and prepare your own vegetables, paying for packing and convenience isn't worth the money or the Earth.
Need a new tool or a new sheet for baking? You'd be better off going to a department shop and buying a lot of these things, since they are priced very high.
A grocery store's greeting card selection is limited, and even the cheapest brands cost $3–$4. When choosing a card, department stores provide more alternatives and lower prices.
Even the most common prescription prescriptions cost more at food stores. Find a dedicated pharmacy if you're always spending extra.
Making your own dressings for healthy salads is easier and cheaper. You also avoid the fat, sugar, and calories in bottled brands, which make salads pointless.
Avoid food-dated beef. You may buy spoiled meat because workers repackage and modify the label date. Buy fresh cuts or from a butcher if you must.
Weary parents need daily groceries. They price up diapers and other things since it's easier to purchase there with a crying baby than make multiple stops. Get baby supplies elsewhere.
Pre-shredded cheese has several additives, so buying a block and grating it yourself is cheaper. Shred it yourself to save money and health.
A liquor store or Costco, which carries all your favorite brands, is cheaper than a grocery store, which may provide a decent discount on your favorite beer or wine.