If you assign a priority to each To Do item according to where you'd like it to appear in your list, you will have a useful way to organize and view your To Do list.
Whenever you are editing a To Do you'll see the priority list just below the edit area:

Click on the priority you want to assign to this To Do and when you are done editing it be sure to click on Save and Exit.
You can edit a To Do item to change its priority at any time.
Another easy way to adjust the priority of a To Do item is to click on the check box next to the item, as the first two items in this image were checked:
You can then click on either the "More Important" or "Less Important" buttons to move the item higher or lower in the priority list.