Or perhaps just show you just the items with a certain priority...
I agree, along with a reminder or notification (iphone) related to the due date/time.
I completely agree with "Please" below - add a reminder or alarm feature with date/time selection!
I used to use Brainforest (back in the Palm Pilot days) and this is the closest outline-based program to that old product that I have been able to find. It had a great reminder/alarm feature.