Slopegraphs can be useful to show comparisons between groups. For example, when reporting employee survey results, a slopegraph can be used to show a given team's feedback across survey categories compared to the overall company. Check out this post to see an example and read more about slopegraphs.

When it comes to slides that communicate data, I don't typically recommend anything other than a white background. That said, sometimes there are considerations outside of the ideal scenario for communicating with data. Check out this post to see what I did to visualize data on a dark background.

The Pew Research Center reports on some fascinating data. But I tend to be underwhelmed with the way they illustrate this data visually. In many cases, some relatively minor modifications would transform the graphs from "not horrible" to great. Check out this post for an example.

We've all created a graph before and thought: Does this work? My advice when this situation arises is to seek feedback. Jon Schwabish has brought this critical feedback loop online, with his recently launched site, HelpMeViz, which was designed to "facilitate discussion, debate, and collaboration from the data visualization community." Check out this post for more info on this resource.