David Rodgers provides some tips.
First off, and most importantly, the objective of your presentation is to in some way benefit your audience. Not you. You are not the primary focus of your presentation. Your audience is. If the audience wont like some component of your presentation, take it out. This does not mean take bad news out of a presentation, no one wants to hear that profits are down 75%, but it does mean remove the parts of the presentation that are bad.
Second, if someone can look at each slide of your presentation and get just as much out of it as if hed been in attendence, rework it. All of it. Find some better things to say or dont give a presentation.