Suggestion: Add the ability to numerically sort tasks in My Day

I really like the My Day feature, but due to the nature of my job, I often get interrupted while working on tasks, so assigning times to the tasks doesn't really work for me. I would love the ability to assign numbers to the tasks in My Day that automatically update when I mark a task as complete. For example, if I have 4 tasks in my day, I'd number them in the order I need to work on them, and then, when I mark the task numbered 1 as complete, the task numbered two would automatically update to be number 1. 

It would also be nice if there was an option to mark uncompleted tasks from My Day to automatically carry over to the next day's My Day list.