Using a transparency or computer slide for every paragrph of the presentation leads to overload. Be able to justify why a visual is included, and why it is designed the way it is.
Overhead transparencies remain the most common medium in business presentations.
Despite the increasing use of computer projection, many companies do not have computer projection facilities, so you need to know how to prepare and use overheads effectively. Using transparencies and the overhead projector smoothly requires forethought and practice. Strip out clutter and needless decoration from slides. Dark background, light type, and conservative color choice work best. Limit lines to 5.