Extend the functionality of the Tasks by making them recurable.  For instance, perhaps I want a reminder to take out the garbage every Tuesday.  Currently I would have to create the item as an appointment and it would take up space with the other appointments even though one couldn't really call it an appointment.  It would be preferable to handle it as a task that can recur, which would disappear from the tasks list (if I'm only displaying today's tasks) and reappear on the date it's due.

Outlook's tasks are recurable.