Make sure you strictly stick to your shopping list and include everything from the beginning.
If you are purchasing cottage cheese, store it upside down as it will last longer.
If you are shopping from open market then prefer visiting at night as the prices are generally lowered.
Buy family packs for everything you use daily.
Do not buy things just because they are on sale.
If you find better deals online, purchase those items and get rest of them from the store.