I know in my undergrad program at the university I attend as a student, the better professor's try to involve/interact with you in class. Also, make sure that powerpoint presentation information is available for students to download and review. The interactive portion of class makes you pay attention more, and helps to work the problems out that are being projected on a large screen. But, that's really only applicable in classes of 40 or less.
Also, one thing that the CIS department at my school does, is that they give out a pretest to evaluate what the students already know, and it allows them to tailor the class a little bit. Which would be especially useful if you were starting a new class for the first time and no one else was able to hand you the materials from how it was previously being taught (and that would be assuming that those materials and lesson plans were even good to begin with).
You could also try referencing how to assemble a lesson plan for the course you're going to be teaching from other freely online CIS courses (http://www.intelligentedu.com/cat3.html).
Furthermore, you're going to need to review some books for the course that the students would end up using. So, you'd want to contact the book publisher to see if they have any associated workbooks, powerpoint presentation, and possibly... pre-fabricated lesson plans.
And above all else, try to stick with a book that can be followed by the students, and that hopefully progresses from chapter 1 through the chapter you intend to complete. I can't tell you how much it pisses students off to be in a class where all you do is hop around the book like a scatter brained fool.