Buy in bulk. How can warehouse and discount clubs drastically lower their prices? Because they buy and sell in bulk. And so should you! Consumables that are non-perishable can be purchased 10-15% cheaper when bought in bulk. You will waste money, however, if you purchase food items and allow them to go to waste.  You can repackage almost all the food items you purchase into smaller packages and freeze or otherwise preserve them.  I purchase my cheeses, meats, spices and fresh vegetables in bulk.  Everything is repackaged and frozen so nothing goes to waste.  Remember things such as kitchen towels, cleaners, canned goods, and paper goods are usually also a lot less expensive.