I would like to suggest an To-do task system, where users can add task on a profile, and get list of their task at their “home” page.
This task system I would like to see have the possibility to assign task to groups or private.
Groups can be managers of a profile, your family group or curators.
At home page I would like to see filter option where you can filter out groups, so you can see just your private task or other groups you have selected.
With task you will have the benefits that you can remember where you was and what to do next, but also have the option to share a task with others.
Screencast (Video) of this idea you can see here:
