Errands
The one-list grocery method

One consolidated list is easier to scan than several disconnected notes.
Collect first
Bring meal-plan items, staples and household supplies into one place.
Remove duplicates
Compare the list with what is already in the pantry and refrigerator.
Group by area
Produce, pantry, chilled, frozen and household sections can make the list easier to use.
Keep one editable source
Paper, a notes app or a shared list can all work if the household actually updates it.