One feature in Dr.Explain that I used a lot is that it enables me to quickly ping-pong back and forth between a selected Preview mode and Content Editor mode so I can see how the final product is going to look before I "end off" on a page.  I think this is a huge time saver because many fine points about the page's appearance can be caught and corrected as I go rather than waiting to be caught when I proofread the whole document.

 

This means as I "finish" with a page (and set it to have "Completed" status), that page has real shelf life.  I like this a lot and use it frequently!