Yeah I don't try to remember things that way – I try not to rely on my memory at all. I have a literal list of things like paper towels that I need/want to keep in stock in my house, and when I'm preparing a grocery order, I walk around the house checking all the things on the list, and checking them off if I don't have them and they need to be added to the grocery order. (Or if I were going into a store, they go on to my shopping list to take into the store.)

The list lives on a wiki, so I can access it on my phone.

Grocery orders are not an ad hoc thing. I do one every two weeks in a regular time slot, and it's on my calendar.