The ability to divide actions in sub-actions that are grouped in lists. To begin with maybe only two levels.
What is currently -- for instance -- a list called "shopping". Each action in that list is the name of the store.
It would be great if you can add nested actions under each store that are items that you want to buy in that store.
I used shopping as an example here, but it can also apply to projects, things to do for clients, etc
Maybe an idea is not to show nested items in Timepage app as is true now for lists.