I started a 3x5 tickler file according to the Sidetracked Home Executive system and I've come up with an annoyance and wanted to know how you solve this problem.

I have a "store" that I go to on an irregular basis. But while I'm there, I need to be reminded to pick up some groceries I can't find elsewhere when I run out.

I'm thinking of creating a separate "folder" called "this store" and just drop a card in there for each item as I remember them, or alternatively, just stick a card in there and update the one card. Does this sound right, or should I try something else?