Use the opposite if you re trying to build up to the point - if the audience thinks there s a mystery behind a door, waiting for it to open might be just what you want to keep interest. Every computer has some kind of Clip Art that you can use. Next status meeting, use a few clip art horses in a horse race to show progress. Also, try to back your graphics with a mat effect - a chart shown with a border and a solid background draws attention to the chart. The same effect can be accomplished with a solid color chart with a picture for a background.
Tone is extremely important - in both voice and background sound.
Background sound or music should reflect what you want them to feel exciting, sad, relaxed. If you use music, try to coincide colors - low tones need subtle colors, high tones needs bright. Remember that a presentation or proposal can be the difference between results and failure.