As a visual thinker, I love a good diagram, especially mind maps and flowcharts. They allowed me to gain an overview of all the details, draw connections, summarize information, and identify problems.

A Venn diagram can show data sets such as preferences in market research. When sets intersect (overlap), the elements in the intersection are members of both sets. When the sets have no elements in ...

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...