How do you hack finding Groceries?

There's not much to get, or anything to hack.

Grocery stores are organized by idiosyncratic individuals. The placement of any particular item can change from store to store, even within the same chain. Canned black beans? They're not with the canned red/lima/white beans, they're with the Mexican food, or not. And on and on.

With a new store your best bet is to wind through the entire place looking for what you need as you go. If it's a place you'll go to often then all the better, you'll learn as you go time after time. Brute force it. Done.

try going into a Costco, just having a small index of what they carry let alone what aisle its in would be helpful.

Most traditional grocery stores put all the healthy / low storage lifetime items on the outside of the store perimeter.

Trying to find stuff in the interior is quite hard. Wholefoods is a perfect case in point. Try finding ketchup, you would expect it to be next to bbs sauce, but its in a totally different aisle.