Don't just fill your presentation with tons of text, bullets, images and annoying animations. Your PowerPoint should be a balanced combination of text, images and animation effects. PowerPoint presentation can also have narrations or background music if you intend to put it on some online presentation sharing website. A little planning, great script, cool design and sincere hard work will certainly pay you. There is such a abundance of bad presentation that PowerPoint expert and author Ellen Finkelstein has to start a campaign named " death by PowerPoint".
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Here are few resources which you should refer to if you really want your audience to pay attention to what you want to convey:
Guy Kawasaki's 10-20-30 rule