I happened across a keyboard shortcut that I've wanted to know for a long time but didn't take the time to search for. By hitting <ctrl>*, you can turn the paragraph marks on and off quickly and easily.
Having spent a good deal of time in Word (tech writing classes, physics labs, etc.), this is one of those things that I should have taken a few moments to seek out. Today, purely by accident, I found this shortcut. I don't want to forget this one.