So now that I’m not using my Applescript and Numbers grocery list, how am I doing it? 

Two key pieces – Drafts for content entry and Evernote for storage. I created a notebook in Evernote specifically for lists.

In Drafts I have tow actions defined. One adds the current note to a predefined groceries note in Evernote. But there’s lots of time where I need to add items to a non-grocery list, like Target,  home improvement or pet stuff. So I have a separate action which reads the first line of the note as the notebook and adds the rest of the note to that list.

Because I’m a packrat, I also keep the old lists around. Once I’m done at the store, I rename that list by appending the date to it. (And if Evernote would support TextExpander, that’d be even easier — hint hint).