This website describes some of the 'sins' of slide show presentations and provides some useful tips on how to overcome these problems.
"We've all been in the situation where we are sitting through a slide show presentation and our eyes are getting heavy and we've completely lost interest. The BIG question is have you been guilty of the same crime? Have you delivered a presentation that went for too long, was too wordy or too boring?
We've provided you a summary of some tips that will help you avoid the slide show sins to keep your audience awake and attentive." (Evaluation Toolbox, 2010)