Plan your list! Don’t go in any store without a list. I keep a pen and paper in my kitchen and jot down things I may run low on throughout the week. I also use my trusty “ECHO” to keep lists of “to dos”. Of course, the chances I have the list with me when it’s convenient to hit the store is slim, so I either take a picture of the list or I input it in my phone. The Echo keeps my list in an app on my phone so it’s always handy.
Start your list BEFORE you are completely out. E.g. 3 eggs left? It goes on the list.
Keep track of toiletries on the same list.
Sort through the list and assign which products are bought from where. Can they wait until your monthly run or is it something that needs to be picked up for convenience?