Have you tried Superstore's Click and Collect?
I find that it helps me save money because there is no impulse buying. The best part is you don't need to go into Superstore. You just park in a click and collect parking spot and your groceries are brought out to you and loaded into your vehicle. It is great for people who have small children like me.
Try it  and save $10 off your first order of $50 or more.
https://share.realcanadiansuperstore.ca/x/iWCrvm