An alert if an item is past due
An option to add desktop notifications or email notifications like google calendar does.
The ability to set a time of day for an alert for a specific item. So if I have 10 items to do on a particular day, I can place a time next to each item and I'll get an alert when that time is near. The idea is I can work on a particular item and be completely focused until an alert goes off and I have to switch gears to work an a new topic.