i use tasks both with and without due dates:

- on the tasks with due date i only want to act on the due day, not before.
- on tasks without due date i act whenever i have time to spare.

so for my different lists (like work, home, lunch, etc) i want an overview which shows the tasks due today and the ones without due date, because both are interesting for me today.

i achieve this with a smartlist of the following search term:

list:Work and not dueAfter:"today 11:59pm"