If you store yoghurt below 40° F / 5° C, it's okay to consume for 1 to 2 weeks beyond the "sell by" date.
Yogurt
Unopened, refrigerated uncooked pasta can be consumed 7-10 days beyond the use by date.
Fresh pasta
The American Egg Board says they are either a 'Julian' date, showing when the eggs were packaged, or a guidance for merchants to determine how long they may sell them.
Eggs
Hot dogs can be stored 10 days over their expiration date if unopened. Check for strong or odd odours before eating. If so, to be safe, trash them.
Hot dogs
Non-refrigerated milk is safe. It's better for the environment (it's packaged in cardboard or metal boxes) and lasts a month after its expiration date.
Shelf-stable pasteurized milk
Unopened cartons and cans of soup will keep at top quality for 3-5 years beyond their use by date if stored in a dry, cool place out of direct sunlight.
Boxed soups & purees
If properly maintained at a consistent freezing point, frozen veggies will be OK 10 to 12 months after the bag's date.
Frozen vegetables
Spices never "go bad," but they lose effectiveness and flavour with time, so old spice isn't worth using (leave that to the old men).
Spices
In 2015, arctic explorers found and ate safe canned food left there 60 years earlier. Unopened cans stay good indefinitely, regardless of the "use by" date, if they aren't damaged.
Canned foods
Flour isn't equal. Whole wheat flour will last 1 - 3 months at room temperature, 6-8 months in the fridge, and 1 year in the freezer.
Flour
Keep instant coffee at room temperature for 18 months after opening. Whole coffee beans maintain "highest quality" for 2-4 weeks at room temperature.
Coffee
Cookies can also be safely consumed after their expiration date, as long as they are kept in their hermetically sealed container or package.
Cookies
If you just buy a bar occasionally, it will last 2 years. You may use the less-intense chocolate in pastries and other sweet delicacies.