Data is often displayed poorly leaving it difficult to see what is important. By displaying data well the important facts should leap off the page and into the viewers mind. Edward Tufte is an expert on the topic and has published great books. I strongly recommend reading at least one (and if you do I think the odds are good you will read more): Beautiful Evidence, The Visual Display of Quantitative Information, Envisioning Information and Visual Explanations.

Smashing magazine has some nice examples of good display techniques in Data Visualization: Modern Approaches. I don’t like all the examples they show but it does provide some help by showing some creative ways to display data.

Related: Edward Tufte’s new book: Beautiful Evidence - Great Charts - Data Visualization Example