1) Allow user to Collapse items within a list so you can see progress across lists at a glance (e.g. collapse Toiletries, collapse Essentials...)
2) Allow user to Reorder list items within templates— I like to add items, and then re-order them later so that like things are grouped together within a list
3) Provide a Pet icon (paw)
4) Provide a todo list icon (checkmark)