6 sections of todo work
today, important & urgent, released but no priority, important but not urget, ideas, has due date but not important
can add task in any of the 6 section
and can move task from any section to other (by drag and drop)
can add sub task (n level)
collapse and uncollapse (task, subtasks) (single button to collapse/uncollapse all)
mark them complete
add due date
can further categorize tasks by project
can search task by text
