It is a marketing ploy to get your attention. e.g. President Choice jars of peanuts are on the bottom shelf where as jars of Planters peanuts are on the middle shelves....11. Look high and low – not in the middle. The most expensive items are usually put on the shelves where you can easily see and reach them. Some of the less expensive items may be on the higher or lower shelves...
I have noticed some fresh stuff like yogurt will be reduced but when you look at the best before date that is a lot of yogurt to eat up before the expiry date......12. Look at the “best before” and expiry dates. Choose foods with a best before or expiry date that will give you enough time to eat it all and prevent waste...
I have gotten good deals when looking in the reduced section of the meat section. I watch for reduced stickers on other stuff in the fresh meat/deli section also. Pick them up at a good price and put in the freezer. $3 for a take home to bake fresh pizza is a pretty cheap dinner and quick dinner after golf....13. Check out the “reduced” section. Reduced vegetables are good for soups and stews. Ripe bananas are perfect for making muffins or banana bread. Day old bread is fine for eating and makes good French toast or grilled sandwiches. Ripe melons can be diced and frozen, or puréed to make smoothies...

Sometimes it has been cheaper to buy individual items than a case if you stop for a minute to figure out the price per tin for example....15. Compare the unit price for similar items. The unit price tells you how much something costs per “unit” or per 100 grams (g) or 100 millilitres (mL). Don’t worry about using a calculator to figure this out. You can usually find the unit price in small print under the main price. This price can help you compare whether a large or small size of an item is a better buy...
All the quotes above were from: 20 Ways to Save Money on Your Groceries
One thing I have heard of is looking for the fridge (or calling the store about) really reduced stuff that is headed to the garbage but I haven't actually seen one of these fridges where I shop.
The other spot I look for reduced fruit or veg is the reduced shelves at the back of the fruit and veg store. Regularly get a package of strawberries for $1.50 or $2.00 instead of paying $3.99 or $4.99 for the same size package at the front of the store.