I am thinking about mimicking Outlook interface on this.
Let say I am planning my week, and I see that on Tuesday next week I don't see any todo there. So, I move the cursor to the date and hit some keyboard shortcut. Then I will be able to add a todo task to the date. The task will be saved in a preconfigured file (i.e. todo.org). How do I do this?
calendar view I can see that I can add a diary entry to date. But I need more customization.