Use high quality graphics, includin

Use high quality graphics, including photographs. You can take your own high quality photographs with your digital camera, purchase professional stock photography, or use the plethora of high quality images available online. (But be cautious of copyright issues.) Never simply stretch a small, low-resolution photo to make it fit your layout--doing so will degrade the resolution even further.

Avoid using PowerPoint Clip Art or other cartoonish line art. Again, if it is included in the software, your audience has seen it a million times before. It may have been interesting in 1993, but today the inclusion of such clip art often undermines the professionalism of the presenter. There are exceptions, of course, and not all PowerPoint art is dreadful, but use it carefully and judiciously.

I often use images of people in my slides, as photography of people tends to help the audience connect with the slide on a more emotional level. If the photographic image is secondary in importance, then I decrease the opacity and add a Gaussian Blur or motion filter in Photoshop. If the photographic image is the primary area I want the audience to notice (such as a picture of a product), then the image can be more pronounced and little (or no) text is needed.