Hi Gregory:
One technique is sort of like going through the material a second time. I'll start off with, "so let's review the important items". From there I'll essentially teach the class again, but using different media, examples, and labs (if applicable). I'll try to get the students to teach some of the "review".
Although this works, rarely will I ever have too much time, it's usually too little and I'm scambling to get throgh the basics of the lesson.
Regards, Barry