I would like to add a few more lines to the well written article. 1) Before preparing the PPT, think of the level of audience. If you are presenting something to top management, they need not know the basic. They require what is known as "High Level" Presentation. 2) If the audience is a new set of people for whom the concept is new, start from brief basics. It is advisable to cover the basics in talks. 3) Define the purpose of the PPT. Review all the slides after they are prepared, vis-a-vis the purpose defined in the first slide. Close your eyes for three minutes and think whether the purpose has been served. If not, rework on the missing links. 4) Small errors will cost you big. Avoid mistakes in commas, full stops, hyphens etc, as they are will be presented on the screen in a big way 5) Rehearse before a mirror a couple of times so that the duration and your own preparedness could be put to test. May be, your spouse be an audience (and take their criticism very positively in a healthy way). Their views are going to be the views of the negative thinking person in the audience. Attach enough importance to their views.
If you r changing your design templetes. Be careful. becoz after ur changing the design templeted all place holder should be changed. and text and font size will be changed sothat some text will be out of side. so check all the slide after change the desing templexts.