Seven Dirty Secrets of Data Visualization

One of the first questions to ask when considering a potential visualisation design is “Why is this better than a bar chart?” If you’re visualising a single quantitative measure over a single categorical dimension, there is rarely a better option.

I think it is really easy to get too clever displaying data. Even displaying charts and graphs in three dimension can skew the visualization. Don't believe me? Make a pie chart with 10 and 90 percent wedges and display it in three dimensions in Numbers. Then start rotating the the pie and watch how your perception of the 10% wedge changes as it rotates.

Thanks @drdrang for the link.